TY  - JOUR
AU  - Kojić, Andrea
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Toroi, Paula
AU  - Bakrač, Luka
AU  - Božović, Predrag
AU  - Stanković Petrović, Jelena
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13192
AB  - Quality control and assurance of mammography X-ray generators include usage of solid-state detectors and/or ionization chambers which are calibrated in standard reference radiation fields. IEC 61267:2005 standard defines reference mammography radiation fields for Mo/Mo anode/filtration, while various anode/filtration combinations are encountered in clinical mammography X-ray units. Not all Secondary Standard Dosimetry Laboratories have an X-ray generator with Mo/Mo radiation setup, thus traceability can be established only for the available anode/filter combinations which is commonly limited to W/Al. In this study, W/Al radiation fields were established under laboratory conditions by performing half-value layer measurements, and characterization of four solid-state detectors was performed. X-ray multimeter performance was evaluated in terms of energy response in the W/Al radiation fields. In the laboratory conditions the energy response of the dosimeters had larger deviation from unity for dosimeters without appropriate anode/filter combination selected in the software settings, even though most of the dosimeters had uniform relative response. Discrepancy in the response was further investigated by examining its variation induced by available detector software settings, and it was determined that the dosimeter response can vary up to 20 %. In clinical setup, half-value layer was determined, and detector performance was examined. Dosimeters were tested in clinical fields with Mo/Mo, Mo/Rh, W/Rh, W/Ag anode/filter combinations in the X-ray tube voltage range from 25 kV to 35 kV. For most clinical radiation fields, multi-element detectors had energy response deviation within ±5 %. The single-element detector had one software setting available and has exhibited strong energy dependence. Extensive testing of detector response such as presented in this paper allows for correction factor interpolation based on half-value layer.
T2  - Radiation Measurements
T1  - Influence of anode/filtration setup on X-ray multimeter energy response in mammography applications
IS  - InPress
SP  - 107135
DO  - 10.1016/j.radmeas.2024.107135
ER  - 

@article{
author = "Kojić, Andrea and Kržanović, Nikola and Živanović, Miloš and Toroi, Paula and Bakrač, Luka and Božović, Predrag and Stanković Petrović, Jelena",
year = "2024",
abstract = "Quality control and assurance of mammography X-ray generators include usage of solid-state detectors and/or ionization chambers which are calibrated in standard reference radiation fields. IEC 61267:2005 standard defines reference mammography radiation fields for Mo/Mo anode/filtration, while various anode/filtration combinations are encountered in clinical mammography X-ray units. Not all Secondary Standard Dosimetry Laboratories have an X-ray generator with Mo/Mo radiation setup, thus traceability can be established only for the available anode/filter combinations which is commonly limited to W/Al. In this study, W/Al radiation fields were established under laboratory conditions by performing half-value layer measurements, and characterization of four solid-state detectors was performed. X-ray multimeter performance was evaluated in terms of energy response in the W/Al radiation fields. In the laboratory conditions the energy response of the dosimeters had larger deviation from unity for dosimeters without appropriate anode/filter combination selected in the software settings, even though most of the dosimeters had uniform relative response. Discrepancy in the response was further investigated by examining its variation induced by available detector software settings, and it was determined that the dosimeter response can vary up to 20 %. In clinical setup, half-value layer was determined, and detector performance was examined. Dosimeters were tested in clinical fields with Mo/Mo, Mo/Rh, W/Rh, W/Ag anode/filter combinations in the X-ray tube voltage range from 25 kV to 35 kV. For most clinical radiation fields, multi-element detectors had energy response deviation within ±5 %. The single-element detector had one software setting available and has exhibited strong energy dependence. Extensive testing of detector response such as presented in this paper allows for correction factor interpolation based on half-value layer.",
journal = "Radiation Measurements",
title = "Influence of anode/filtration setup on X-ray multimeter energy response in mammography applications",
number = "InPress",
pages = "107135",
doi = "10.1016/j.radmeas.2024.107135"
}

Kojić, A., Kržanović, N., Živanović, M., Toroi, P., Bakrač, L., Božović, P.,& Stanković Petrović, J.. (2024). Influence of anode/filtration setup on X-ray multimeter energy response in mammography applications. in Radiation Measurements(InPress), 107135.
https://doi.org/10.1016/j.radmeas.2024.107135

Kojić A, Kržanović N, Živanović M, Toroi P, Bakrač L, Božović P, Stanković Petrović J. Influence of anode/filtration setup on X-ray multimeter energy response in mammography applications. in Radiation Measurements. 2024;(InPress):107135.
doi:10.1016/j.radmeas.2024.107135 .

Kojić, Andrea, Kržanović, Nikola, Živanović, Miloš, Toroi, Paula, Bakrač, Luka, Božović, Predrag, Stanković Petrović, Jelena, "Influence of anode/filtration setup on X-ray multimeter energy response in mammography applications" in Radiation Measurements, no. InPress (2024):107135,
https://doi.org/10.1016/j.radmeas.2024.107135 . .

TY  - JOUR
AU  - Stanković Petrović, Jelena
AU  - Danilović, Nataša
AU  - Kržanović, Nikola
AU  - Topalović, Dušan
AU  - Živanović, Miloš
AU  - Božović, Predrag
AU  - Todorović, Nataša
AU  - Nikolov, Jovana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11642
AB  - Individual monitoring service at the Department for Radiation and Environmental Protection of Vinca Institute of
Nuclear Sciences performs individual whole-body and extremities monitoring of exposed workers, using thermoluminescent dosimetry (TLD) method. The dosemeters for eye-lens personal dose equivalent measurements,
Hp(3), are not regularly used at the workplaces in Serbia, even though the individual monitoring method is
accredited and available at the dosimetry service. Type testing of Hp(3) dosemeters based on LiF: Mg,Ti, placed in
modified ring holders was done following the changes in ISO 4037:2019 and IEC 62387:2020. The type testing
was done by varying radiation-based influence quantities: photon energies ranging from 33.3 keV up to 1.25
MeV, angle of incidence values of 0◦, 45◦, 60◦, 75◦, dose range from 0.05 mSv to 10 Sv. The results show that the
passive dosimetry monitoring system satisfies IEC 62387:2020 requirements in the mandatory range of influence
quantities, except for the lowest tested energy of 33 keV, when incident radiation angle is ±60◦ and higher.
T2  - Radiation Measurements
T1  - Type-testing of the TLD system used for the assessing the eye lens doses due to ionising radiation
VL  - 168
SP  - 107014
DO  - 10.1016/j.radmeas.2023.107014
ER  - 

@article{
author = "Stanković Petrović, Jelena and Danilović, Nataša and Kržanović, Nikola and Topalović, Dušan and Živanović, Miloš and Božović, Predrag and Todorović, Nataša and Nikolov, Jovana",
year = "2023",
abstract = "Individual monitoring service at the Department for Radiation and Environmental Protection of Vinca Institute of
Nuclear Sciences performs individual whole-body and extremities monitoring of exposed workers, using thermoluminescent dosimetry (TLD) method. The dosemeters for eye-lens personal dose equivalent measurements,
Hp(3), are not regularly used at the workplaces in Serbia, even though the individual monitoring method is
accredited and available at the dosimetry service. Type testing of Hp(3) dosemeters based on LiF: Mg,Ti, placed in
modified ring holders was done following the changes in ISO 4037:2019 and IEC 62387:2020. The type testing
was done by varying radiation-based influence quantities: photon energies ranging from 33.3 keV up to 1.25
MeV, angle of incidence values of 0◦, 45◦, 60◦, 75◦, dose range from 0.05 mSv to 10 Sv. The results show that the
passive dosimetry monitoring system satisfies IEC 62387:2020 requirements in the mandatory range of influence
quantities, except for the lowest tested energy of 33 keV, when incident radiation angle is ±60◦ and higher.",
journal = "Radiation Measurements",
title = "Type-testing of the TLD system used for the assessing the eye lens doses due to ionising radiation",
volume = "168",
pages = "107014",
doi = "10.1016/j.radmeas.2023.107014"
}

Stanković Petrović, J., Danilović, N., Kržanović, N., Topalović, D., Živanović, M., Božović, P., Todorović, N.,& Nikolov, J.. (2023). Type-testing of the TLD system used for the assessing the eye lens doses due to ionising radiation. in Radiation Measurements, 168, 107014.
https://doi.org/10.1016/j.radmeas.2023.107014

Stanković Petrović J, Danilović N, Kržanović N, Topalović D, Živanović M, Božović P, Todorović N, Nikolov J. Type-testing of the TLD system used for the assessing the eye lens doses due to ionising radiation. in Radiation Measurements. 2023;168:107014.
doi:10.1016/j.radmeas.2023.107014 .

Stanković Petrović, Jelena, Danilović, Nataša, Kržanović, Nikola, Topalović, Dušan, Živanović, Miloš, Božović, Predrag, Todorović, Nataša, Nikolov, Jovana, "Type-testing of the TLD system used for the assessing the eye lens doses due to ionising radiation" in Radiation Measurements, 168 (2023):107014,
https://doi.org/10.1016/j.radmeas.2023.107014 . .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Stanković Petrović, Jelena
AU  - Živanović, Miloš
AU  - Krajinović, Marko
AU  - Topalović, Dušan
AU  - Kojić, Andrea
AU  - Božović, Predrag
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11908
AB  - Accuracy of measurement in individual dosimetry monitoring service is achieved by performing calibration of dosemeters, ensuring that the measured values are traceable to the primary standard for the quantity of interest. Even though a dosemeter can exhibit remarkable performance in the reference calibration radiation field (e.g. 137Cs), its performance can greatly differ under certain conditions. Effects of different influence quantities need to be examined to ensure that the dosemeters are reliable for use in a specific ionizing radiation practice. The most significant radiation characteristic influence quantities are the radiation energy, angle of incidence and dose (rate). International standards issued by IEC and ISO define radiation conditions and procedures for dosemeter type testing under effects of different radiation, environmental and mechanical influence quantities. Dosemeter performance is expressed in terms of relative response and is evaluated by comparing with defined limits of variation, taking into account the measurement uncertainty, according to [IEC 62387:2020, IEC, 2020]. A passive dosimetry system based on LiF:Mg,Ti thermoluminescent dosemeters (TLD) was tested for the effects of photon energy and angle of incidence in two dosemeter orientations, horizontal (up/down) and vertical (left/right), for the measurement of personal dose equivalent (Hp(10) and Hp(0.07)). The dosemeters were read out on the Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA), calibrated in 137Cs reference field. Low-energy X-ray reference field N-40, established according to ISO 4037-1:2019 [ISO 4037, ISO, 2019] and ±45°, ±60° angles of incidence were used to examine the passive dosimetry system performance. Limits of variation from -29 % to +67 %, defined in [IEC 62387:2020, IEC, 2020] for energy and angular relative response, were used for performance evaluation. The overresponses for Hp(10) for 45° and 60° were (51 – 62) % and (76 – 88) %, respectively. The results for Hp(0.07) for 45° and 60° were (66 – 69) % and (79 – 95) %, respectively. Thus, for both quantities it was observed that the criteria are met for the angle of ±45°, while for ±60° neither comply with the standard, for both dosemeter orientations, when uncertainties are taken into account. This shows that tested TLD system has high overresponse in low energy photon fields when larger angle of incidence values is encountered. The response could be improved if dosemeters are calibrated using appropriate reference calibration field or if different dosemeter holder is employed.
PB  - Niš : Sievert Association
C3  - RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
T1  - LiF:Mg,Ti TLD angular dependence evaluation at low energy incident radiation
SP  - 60
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11908
ER  - 

@conference{
author = "Kržanović, Nikola and Stanković Petrović, Jelena and Živanović, Miloš and Krajinović, Marko and Topalović, Dušan and Kojić, Andrea and Božović, Predrag",
year = "2023",
abstract = "Accuracy of measurement in individual dosimetry monitoring service is achieved by performing calibration of dosemeters, ensuring that the measured values are traceable to the primary standard for the quantity of interest. Even though a dosemeter can exhibit remarkable performance in the reference calibration radiation field (e.g. 137Cs), its performance can greatly differ under certain conditions. Effects of different influence quantities need to be examined to ensure that the dosemeters are reliable for use in a specific ionizing radiation practice. The most significant radiation characteristic influence quantities are the radiation energy, angle of incidence and dose (rate). International standards issued by IEC and ISO define radiation conditions and procedures for dosemeter type testing under effects of different radiation, environmental and mechanical influence quantities. Dosemeter performance is expressed in terms of relative response and is evaluated by comparing with defined limits of variation, taking into account the measurement uncertainty, according to [IEC 62387:2020, IEC, 2020]. A passive dosimetry system based on LiF:Mg,Ti thermoluminescent dosemeters (TLD) was tested for the effects of photon energy and angle of incidence in two dosemeter orientations, horizontal (up/down) and vertical (left/right), for the measurement of personal dose equivalent (Hp(10) and Hp(0.07)). The dosemeters were read out on the Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA), calibrated in 137Cs reference field. Low-energy X-ray reference field N-40, established according to ISO 4037-1:2019 [ISO 4037, ISO, 2019] and ±45°, ±60° angles of incidence were used to examine the passive dosimetry system performance. Limits of variation from -29 % to +67 %, defined in [IEC 62387:2020, IEC, 2020] for energy and angular relative response, were used for performance evaluation. The overresponses for Hp(10) for 45° and 60° were (51 – 62) % and (76 – 88) %, respectively. The results for Hp(0.07) for 45° and 60° were (66 – 69) % and (79 – 95) %, respectively. Thus, for both quantities it was observed that the criteria are met for the angle of ±45°, while for ±60° neither comply with the standard, for both dosemeter orientations, when uncertainties are taken into account. This shows that tested TLD system has high overresponse in low energy photon fields when larger angle of incidence values is encountered. The response could be improved if dosemeters are calibrated using appropriate reference calibration field or if different dosemeter holder is employed.",
publisher = "Niš : Sievert Association",
journal = "RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts",
title = "LiF:Mg,Ti TLD angular dependence evaluation at low energy incident radiation",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11908"
}

Kržanović, N., Stanković Petrović, J., Živanović, M., Krajinović, M., Topalović, D., Kojić, A.,& Božović, P.. (2023). LiF:Mg,Ti TLD angular dependence evaluation at low energy incident radiation. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
Niš : Sievert Association., 60-60.
https://hdl.handle.net/21.15107/rcub_vinar_11908

Kržanović N, Stanković Petrović J, Živanović M, Krajinović M, Topalović D, Kojić A, Božović P. LiF:Mg,Ti TLD angular dependence evaluation at low energy incident radiation. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts. 2023;:60-60.
https://hdl.handle.net/21.15107/rcub_vinar_11908 .

Kržanović, Nikola, Stanković Petrović, Jelena, Živanović, Miloš, Krajinović, Marko, Topalović, Dušan, Kojić, Andrea, Božović, Predrag, "LiF:Mg,Ti TLD angular dependence evaluation at low energy incident radiation" in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts (2023):60-60,
https://hdl.handle.net/21.15107/rcub_vinar_11908 .

TY  - CONF
AU  - Kojić, Andrea
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Božović, Predrag
AU  - Stanković Petrović, Jelena
AU  - Komatina, Ivana
AU  - Vlahović, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11909
AB  - Ionization chambers and solid state detectors incorporated into multimeters are often used for quality control in different modalities of medical imaging and diagnostic radiology. The equipment to be used in the routine QC procedures needs to be calibrated under well-known radiation conditions (known as radiation qualities) defined by the international standards. International standards IEC 61267:2005 [IEC 62167, IEC 2005] and IAEA TRS 457:2007 [IAEA TRS 457, IAEA 2007] cover general radiography and fluoroscopy radiation qualities (abbreviated as RQR and RQA series, in the voltage range from 40 kV to 150 kV), and computerized tomography radiation qualities (abbreviated as RQT series, in the voltage range from 100 kV to 150 kV), among other. In the field of mammography reference radiation fields are defined for molybdenum anode/filtration combination (Mo/Mo, abbreviated as RQR-M series, in the voltage range from 25 kV to 35 kV). Since Mo/Mo mammography units are widespread and available at hospitals they have been included in the standard [IEC 62167, IEC 2005]. Even so, Secondary Standard Dosimetry Laboratories (SSDLs) that are performing calibrations of QC dosimeters for end-users, rarely have availability of such anode/filtration combination under reference laboratory conditions. SSDLs most often employ X-ray generators with W/Al combinations. Additionally, nowadays many different combinations of anode/filtration are present in mammography units of different manufacturers that are commonly used in the hospitals. Multimeters are often sensitive to spectral changes caused by different anode/filter combination, so it is doubtful that the traceability established for one anode/filter combination can be used to measure doses for another combination. Measurements with different solid state detectors were performed under laboratory conditions with W/Al radiation qualities established in the SSDL. In the future, research will be expanded to clinical conditions in radiation fields produced by mammography units which employ Mo/Mo, Mo/Rh, Rh/Rh, W/Rh and W/Ag. Dosimeter response will be evaluated based on the dependency of 1st HVL which is correlated to radiation output of the X-ray generator (the incident photon spectra).
PB  - Niš : Sievert Association
C3  - RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
T1  - Solid state detector energy response in W/Al mammography radiation quality series
SP  - 30
EP  - 30
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11909
ER  - 

@conference{
author = "Kojić, Andrea and Kržanović, Nikola and Živanović, Miloš and Božović, Predrag and Stanković Petrović, Jelena and Komatina, Ivana and Vlahović, Jelena",
year = "2023",
abstract = "Ionization chambers and solid state detectors incorporated into multimeters are often used for quality control in different modalities of medical imaging and diagnostic radiology. The equipment to be used in the routine QC procedures needs to be calibrated under well-known radiation conditions (known as radiation qualities) defined by the international standards. International standards IEC 61267:2005 [IEC 62167, IEC 2005] and IAEA TRS 457:2007 [IAEA TRS 457, IAEA 2007] cover general radiography and fluoroscopy radiation qualities (abbreviated as RQR and RQA series, in the voltage range from 40 kV to 150 kV), and computerized tomography radiation qualities (abbreviated as RQT series, in the voltage range from 100 kV to 150 kV), among other. In the field of mammography reference radiation fields are defined for molybdenum anode/filtration combination (Mo/Mo, abbreviated as RQR-M series, in the voltage range from 25 kV to 35 kV). Since Mo/Mo mammography units are widespread and available at hospitals they have been included in the standard [IEC 62167, IEC 2005]. Even so, Secondary Standard Dosimetry Laboratories (SSDLs) that are performing calibrations of QC dosimeters for end-users, rarely have availability of such anode/filtration combination under reference laboratory conditions. SSDLs most often employ X-ray generators with W/Al combinations. Additionally, nowadays many different combinations of anode/filtration are present in mammography units of different manufacturers that are commonly used in the hospitals. Multimeters are often sensitive to spectral changes caused by different anode/filter combination, so it is doubtful that the traceability established for one anode/filter combination can be used to measure doses for another combination. Measurements with different solid state detectors were performed under laboratory conditions with W/Al radiation qualities established in the SSDL. In the future, research will be expanded to clinical conditions in radiation fields produced by mammography units which employ Mo/Mo, Mo/Rh, Rh/Rh, W/Rh and W/Ag. Dosimeter response will be evaluated based on the dependency of 1st HVL which is correlated to radiation output of the X-ray generator (the incident photon spectra).",
publisher = "Niš : Sievert Association",
journal = "RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts",
title = "Solid state detector energy response in W/Al mammography radiation quality series",
pages = "30-30",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11909"
}

Kojić, A., Kržanović, N., Živanović, M., Božović, P., Stanković Petrović, J., Komatina, I.,& Vlahović, J.. (2023). Solid state detector energy response in W/Al mammography radiation quality series. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
Niš : Sievert Association., 30-30.
https://hdl.handle.net/21.15107/rcub_vinar_11909

Kojić A, Kržanović N, Živanović M, Božović P, Stanković Petrović J, Komatina I, Vlahović J. Solid state detector energy response in W/Al mammography radiation quality series. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts. 2023;:30-30.
https://hdl.handle.net/21.15107/rcub_vinar_11909 .

Kojić, Andrea, Kržanović, Nikola, Živanović, Miloš, Božović, Predrag, Stanković Petrović, Jelena, Komatina, Ivana, Vlahović, Jelena, "Solid state detector energy response in W/Al mammography radiation quality series" in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts (2023):30-30,
https://hdl.handle.net/21.15107/rcub_vinar_11909 .

TY  - CONF
AU  - Topalović, Dušan
AU  - Krajinović, Marko
AU  - Vlahović, Jelena
AU  - Kržanović, Nikola
AU  - Božović, Predrag
AU  - Stanković Petrović, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11913
AB  - Thermoluminescent dosimetry is a widely used passive dosimetry method for estimating protection quantities i.e. the effective or equivalent dose. When the thermoluminescent dosemeters (TLD) are irradiated, they store the dose information through the processes of ionisation and subsequent trapping of charge carriers. The charge carriers in TLD crystalline material move from the ground state to the higher energy states (trapping centres) that are partially stable at room temperature. By heating the material, charge carriers leave the metastable energy states and recombine at recombination centres, emitting light (glow). The heating procedure gives rise to a glow curve (GC) – the light intensity as a function of temperature and time. By calibrating the TLD reader, the area under the GC is converted to a dose value (e.g., personal dose equivalent, Hp(10)). The shape of the GC depends on the time-temperature profile (TTP) defined for each TLD material separately and may be regular or possess some anomalies. Inspecting the GC shape, as one of quality control measures, is usually conducted qualitatively and performed by trained TLD service staff. Hence, this paper presents the implementation of the machine learning Time Series Forest (TSF) method for the classification of anomalous GCs of LiF:Mg,Ti based TLD. TSF is a tree – ensemble method that combines entropy gain and distance measure for evaluating splits. This method shows significant computational efficiency compared to the well – known one – nearest – neighbour classifier. The dataset used for the TSF method consists of 201 normalized GCs exported by the software supplied with Harshaw 6600 Plus Automated Reader – WinREMS. The dataset is labelled into five different classes: (1) regular shape, (2) spikes at random positions, (3) TLD signal in the low – temperature region, (4) TLD signal in the high – temperature region, and (5) shift of the entire GC to higher temperatures. A random split of the dataset into training and testing in a 70/30 training/test ratio was performed, while the 10 – fold cross – validation was used for the hyperparameter tuning. The results showed that the TSF method can classify four different anomalies for GC with an accuracy of 96% and a macro average F1 score of 96%. According to the obtained results, it is possible to conclude that the TSF is a promising candidate method that could be implemented as a new software package for automated GC quality control within the TLD service
PB  - Niš : Sievert Association
C3  - RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
T1  - A Time Series Forest Method for automatic classification of anomalous glow curves of LiF:Mg,Ti based thermoluminescent dosemeters
SP  - 31
EP  - 31
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11913
ER  - 

@conference{
author = "Topalović, Dušan and Krajinović, Marko and Vlahović, Jelena and Kržanović, Nikola and Božović, Predrag and Stanković Petrović, Jelena",
year = "2023",
abstract = "Thermoluminescent dosimetry is a widely used passive dosimetry method for estimating protection quantities i.e. the effective or equivalent dose. When the thermoluminescent dosemeters (TLD) are irradiated, they store the dose information through the processes of ionisation and subsequent trapping of charge carriers. The charge carriers in TLD crystalline material move from the ground state to the higher energy states (trapping centres) that are partially stable at room temperature. By heating the material, charge carriers leave the metastable energy states and recombine at recombination centres, emitting light (glow). The heating procedure gives rise to a glow curve (GC) – the light intensity as a function of temperature and time. By calibrating the TLD reader, the area under the GC is converted to a dose value (e.g., personal dose equivalent, Hp(10)). The shape of the GC depends on the time-temperature profile (TTP) defined for each TLD material separately and may be regular or possess some anomalies. Inspecting the GC shape, as one of quality control measures, is usually conducted qualitatively and performed by trained TLD service staff. Hence, this paper presents the implementation of the machine learning Time Series Forest (TSF) method for the classification of anomalous GCs of LiF:Mg,Ti based TLD. TSF is a tree – ensemble method that combines entropy gain and distance measure for evaluating splits. This method shows significant computational efficiency compared to the well – known one – nearest – neighbour classifier. The dataset used for the TSF method consists of 201 normalized GCs exported by the software supplied with Harshaw 6600 Plus Automated Reader – WinREMS. The dataset is labelled into five different classes: (1) regular shape, (2) spikes at random positions, (3) TLD signal in the low – temperature region, (4) TLD signal in the high – temperature region, and (5) shift of the entire GC to higher temperatures. A random split of the dataset into training and testing in a 70/30 training/test ratio was performed, while the 10 – fold cross – validation was used for the hyperparameter tuning. The results showed that the TSF method can classify four different anomalies for GC with an accuracy of 96% and a macro average F1 score of 96%. According to the obtained results, it is possible to conclude that the TSF is a promising candidate method that could be implemented as a new software package for automated GC quality control within the TLD service",
publisher = "Niš : Sievert Association",
journal = "RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts",
title = "A Time Series Forest Method for automatic classification of anomalous glow curves of LiF:Mg,Ti based thermoluminescent dosemeters",
pages = "31-31",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11913"
}

Topalović, D., Krajinović, M., Vlahović, J., Kržanović, N., Božović, P.,& Stanković Petrović, J.. (2023). A Time Series Forest Method for automatic classification of anomalous glow curves of LiF:Mg,Ti based thermoluminescent dosemeters. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
Niš : Sievert Association., 31-31.
https://hdl.handle.net/21.15107/rcub_vinar_11913

Topalović D, Krajinović M, Vlahović J, Kržanović N, Božović P, Stanković Petrović J. A Time Series Forest Method for automatic classification of anomalous glow curves of LiF:Mg,Ti based thermoluminescent dosemeters. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts. 2023;:31-31.
https://hdl.handle.net/21.15107/rcub_vinar_11913 .

Topalović, Dušan, Krajinović, Marko, Vlahović, Jelena, Kržanović, Nikola, Božović, Predrag, Stanković Petrović, Jelena, "A Time Series Forest Method for automatic classification of anomalous glow curves of LiF:Mg,Ti based thermoluminescent dosemeters" in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts (2023):31-31,
https://hdl.handle.net/21.15107/rcub_vinar_11913 .

TY  - CONF
AU  - Kojić, Andrea
AU  - Kržanović, Nikola
AU  - Komatina, Ivana
AU  - Živanović, Miloš
AU  - Stanković Petrović, Jelena
AU  - Vlahović, Jelena
AU  - Božović, Predrag
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11927
AB  - Clinical mammography units utilize compression paddle for breast compression during exposure. When compression paddle is released, it returns to a default position which varies between different mammography units. This default position is commonly used in quality control procedures. Guidelines for quality control testing in mammography propose measuring the half-value layer (HVL) by placing added filtration on compression paddle while multimeter is positioned on the mammography unit's detector. The influence of compression paddle positioning on HVL measurements was studied under laboratory conditions. The difference in HVL values with and without the presence of the plate is not insignificant, the positioning of the plate also has a significant impact on the measurements.
AB  - Kliničke mamografske jedinice sadrže kompresione papučice koje se koriste u svrhe kompresije dojke prilikom ekspozicije. Nakon oslobađanja kompresione papučice ona se vraća u uobičajeni položaj koji se razlikuje među mamografskim jedinicama. Ova pozicija se najčešće koristi tokom testiranja pri kontroli kvaliteta. Protokoli za kontrolu kvaliteta u mamografiji predlažu merenje debljine poluslabljenja (HVL) postavljanjem dodatnih filtera na kompresionu papučicu dok se multimetar postavlja na detektor mamografske jedinice. Uticaj pozicioniranja kompresione papučice na HVL merenja je ispitan u laboratorijskim uslovima. Razlika u vrednostima za HVL sa i bez prisustva PMMA ploče nije zanemarljiva, dakle pozicioniranje ploče ima značajan uticaj na izmerene vrednosti.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 32. simpozijum DZZSCG : zbornik radova
T1  - The influence of compression paddle positioning on HVL measurements in mammography
T1  - Uticaj pozicije kompresione papučice na HVL merenja u mammografiji
SP  - 382
EP  - 386
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11927
ER  - 

@conference{
author = "Kojić, Andrea and Kržanović, Nikola and Komatina, Ivana and Živanović, Miloš and Stanković Petrović, Jelena and Vlahović, Jelena and Božović, Predrag",
year = "2023",
abstract = "Clinical mammography units utilize compression paddle for breast compression during exposure. When compression paddle is released, it returns to a default position which varies between different mammography units. This default position is commonly used in quality control procedures. Guidelines for quality control testing in mammography propose measuring the half-value layer (HVL) by placing added filtration on compression paddle while multimeter is positioned on the mammography unit's detector. The influence of compression paddle positioning on HVL measurements was studied under laboratory conditions. The difference in HVL values with and without the presence of the plate is not insignificant, the positioning of the plate also has a significant impact on the measurements., Kliničke mamografske jedinice sadrže kompresione papučice koje se koriste u svrhe kompresije dojke prilikom ekspozicije. Nakon oslobađanja kompresione papučice ona se vraća u uobičajeni položaj koji se razlikuje među mamografskim jedinicama. Ova pozicija se najčešće koristi tokom testiranja pri kontroli kvaliteta. Protokoli za kontrolu kvaliteta u mamografiji predlažu merenje debljine poluslabljenja (HVL) postavljanjem dodatnih filtera na kompresionu papučicu dok se multimetar postavlja na detektor mamografske jedinice. Uticaj pozicioniranja kompresione papučice na HVL merenja je ispitan u laboratorijskim uslovima. Razlika u vrednostima za HVL sa i bez prisustva PMMA ploče nije zanemarljiva, dakle pozicioniranje ploče ima značajan uticaj na izmerene vrednosti.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "32. simpozijum DZZSCG : zbornik radova",
title = "The influence of compression paddle positioning on HVL measurements in mammography, Uticaj pozicije kompresione papučice na HVL merenja u mammografiji",
pages = "382-386",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11927"
}

Kojić, A., Kržanović, N., Komatina, I., Živanović, M., Stanković Petrović, J., Vlahović, J.,& Božović, P.. (2023). The influence of compression paddle positioning on HVL measurements in mammography. in 32. simpozijum DZZSCG : zbornik radova
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 382-386.
https://hdl.handle.net/21.15107/rcub_vinar_11927

Kojić A, Kržanović N, Komatina I, Živanović M, Stanković Petrović J, Vlahović J, Božović P. The influence of compression paddle positioning on HVL measurements in mammography. in 32. simpozijum DZZSCG : zbornik radova. 2023;:382-386.
https://hdl.handle.net/21.15107/rcub_vinar_11927 .

Kojić, Andrea, Kržanović, Nikola, Komatina, Ivana, Živanović, Miloš, Stanković Petrović, Jelena, Vlahović, Jelena, Božović, Predrag, "The influence of compression paddle positioning on HVL measurements in mammography" in 32. simpozijum DZZSCG : zbornik radova (2023):382-386,
https://hdl.handle.net/21.15107/rcub_vinar_11927 .

TY  - CONF
AU  - Božović, Predrag
AU  - Kojić, Andrea
AU  - Kržanović, Nikola
AU  - Topalović, Dušan
AU  - Stanković Petrović, Jelena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11928
AB  - The aim of this work is to examine the accuracy of the delivered dose inside the blood irradiator using TL dosimeters. The TL dosimeters were placed behind the lead plate and were irradiated with absorbed dose values ranging from 50 mGy to 5 Gy in the 60Co reference radiation field. The deviations of the TL dosimeter readings in relation to the delivered values of the absorbed dose range from 7.8 % to 19.6 % with satisfactory linearity over the entire range of delivered doses (R=0.997). Monte Carlo simulations were used to determine the conversion coefficients for the application of this method in the 137Cs radiation field for devices that work with this type of radiation source.
AB  - Cilj ovog rada je ispitivanje tačnosti isporučene doze unutar ozračivača krvi koristeći TL dozimetre. TL dozimetri su postavljeni iza olovne ploče i ozračeni su vrednostima apsorbovane doze u opsegu od 50 mGy do 5 Gy u referentnom polju zračenja 60Co. Odstupanja očitavanja TL dozimetara u odnosu na isporučene vrednosti apsorbovane doze su u opsegu od 7.8% do 19.6% uz zadovoljavajuću linearnost na celom opsegu isporučenih doza (R=0.997). Monte Karlo simulacijama su određeni konverzioni koeficijenti za primenu ovog metoda i u polju zračenja 137Cs za uređaje koji rade sa ovom vrstom izvora zračenja.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 32. simpozijum DZZSCG : zbornik radova
T1  - Application of TL Dosimeters for testing the accuracy of delivered dose in blood irradiator
T1  - Primena TL dozimetara za ispitivanje tačnosti isporučene doze u ozračivaču krvi
SP  - 387
EP  - 393
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11928
ER  - 

@conference{
author = "Božović, Predrag and Kojić, Andrea and Kržanović, Nikola and Topalović, Dušan and Stanković Petrović, Jelena",
year = "2023",
abstract = "The aim of this work is to examine the accuracy of the delivered dose inside the blood irradiator using TL dosimeters. The TL dosimeters were placed behind the lead plate and were irradiated with absorbed dose values ranging from 50 mGy to 5 Gy in the 60Co reference radiation field. The deviations of the TL dosimeter readings in relation to the delivered values of the absorbed dose range from 7.8 % to 19.6 % with satisfactory linearity over the entire range of delivered doses (R=0.997). Monte Carlo simulations were used to determine the conversion coefficients for the application of this method in the 137Cs radiation field for devices that work with this type of radiation source., Cilj ovog rada je ispitivanje tačnosti isporučene doze unutar ozračivača krvi koristeći TL dozimetre. TL dozimetri su postavljeni iza olovne ploče i ozračeni su vrednostima apsorbovane doze u opsegu od 50 mGy do 5 Gy u referentnom polju zračenja 60Co. Odstupanja očitavanja TL dozimetara u odnosu na isporučene vrednosti apsorbovane doze su u opsegu od 7.8% do 19.6% uz zadovoljavajuću linearnost na celom opsegu isporučenih doza (R=0.997). Monte Karlo simulacijama su određeni konverzioni koeficijenti za primenu ovog metoda i u polju zračenja 137Cs za uređaje koji rade sa ovom vrstom izvora zračenja.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "32. simpozijum DZZSCG : zbornik radova",
title = "Application of TL Dosimeters for testing the accuracy of delivered dose in blood irradiator, Primena TL dozimetara za ispitivanje tačnosti isporučene doze u ozračivaču krvi",
pages = "387-393",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11928"
}

Božović, P., Kojić, A., Kržanović, N., Topalović, D.,& Stanković Petrović, J.. (2023). Application of TL Dosimeters for testing the accuracy of delivered dose in blood irradiator. in 32. simpozijum DZZSCG : zbornik radova
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 387-393.
https://hdl.handle.net/21.15107/rcub_vinar_11928

Božović P, Kojić A, Kržanović N, Topalović D, Stanković Petrović J. Application of TL Dosimeters for testing the accuracy of delivered dose in blood irradiator. in 32. simpozijum DZZSCG : zbornik radova. 2023;:387-393.
https://hdl.handle.net/21.15107/rcub_vinar_11928 .

Božović, Predrag, Kojić, Andrea, Kržanović, Nikola, Topalović, Dušan, Stanković Petrović, Jelena, "Application of TL Dosimeters for testing the accuracy of delivered dose in blood irradiator" in 32. simpozijum DZZSCG : zbornik radova (2023):387-393,
https://hdl.handle.net/21.15107/rcub_vinar_11928 .

TY  - JOUR
AU  - Kržanović, Nikola
AU  - Stanković-Petrović, Jelena S.
AU  - Živanović, Miloš
AU  - Krajinović, Marko
AU  - Božović, Predrag
AU  - Kojić, Andrea
AU  - Topalović, Dušan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11433
AB  - A need for detailed testing of individual monitoring systems used in accredited service at the Vinca Institute of Nuclear Sciences was recognized following changes in individual, workplace, and environmental monitoring passive dosimetry systems acceptability criteria stated in IEC 62387:2020 and changes related to reference fields used in radiation protection defined in ISO 4037:2019. Reliability and accuracy of dosimetry data acquired by passive dosimetry systems used for individual monitoring is assured by carrying out type tests. In this manner, the effects of different radiation influence quantities are examined. Passive dosimetry systems comprised of an LiF:Mg,Ti (TLD-100) detector card placed in two different holder models (8814 and 8850) and the Harshaw TLD Model 6600 Plus Automated Reader were tested. Type tests were done in an extended range of photon energies from 40 keV up to 1.25 MeV, angle of incidence values of ±45° and ± 60° for both vertical and horizontal dosimeter orientation, and in the dose range from 0.05 mSv to 1 Sv. Both dosimetry system configurations perform in line with IEC 62387:2020 within mandatory range for tested influence quantities. Dosimeters that use the 8850 holder type showed less pronounced energy and angular dependence of the response in the low-energy range.
T2  - Health Physics
T1  - Characterization of Thermoluminescent Dosimetry Systems According to the IEC 62387:2020 Standard
VL  - 125
IS  - 3
SP  - 186
EP  - 197
DO  - 10.1097/HP.0000000000001711
ER  - 

@article{
author = "Kržanović, Nikola and Stanković-Petrović, Jelena S. and Živanović, Miloš and Krajinović, Marko and Božović, Predrag and Kojić, Andrea and Topalović, Dušan",
year = "2023",
abstract = "A need for detailed testing of individual monitoring systems used in accredited service at the Vinca Institute of Nuclear Sciences was recognized following changes in individual, workplace, and environmental monitoring passive dosimetry systems acceptability criteria stated in IEC 62387:2020 and changes related to reference fields used in radiation protection defined in ISO 4037:2019. Reliability and accuracy of dosimetry data acquired by passive dosimetry systems used for individual monitoring is assured by carrying out type tests. In this manner, the effects of different radiation influence quantities are examined. Passive dosimetry systems comprised of an LiF:Mg,Ti (TLD-100) detector card placed in two different holder models (8814 and 8850) and the Harshaw TLD Model 6600 Plus Automated Reader were tested. Type tests were done in an extended range of photon energies from 40 keV up to 1.25 MeV, angle of incidence values of ±45° and ± 60° for both vertical and horizontal dosimeter orientation, and in the dose range from 0.05 mSv to 1 Sv. Both dosimetry system configurations perform in line with IEC 62387:2020 within mandatory range for tested influence quantities. Dosimeters that use the 8850 holder type showed less pronounced energy and angular dependence of the response in the low-energy range.",
journal = "Health Physics",
title = "Characterization of Thermoluminescent Dosimetry Systems According to the IEC 62387:2020 Standard",
volume = "125",
number = "3",
pages = "186-197",
doi = "10.1097/HP.0000000000001711"
}

Kržanović, N., Stanković-Petrović, J. S., Živanović, M., Krajinović, M., Božović, P., Kojić, A.,& Topalović, D.. (2023). Characterization of Thermoluminescent Dosimetry Systems According to the IEC 62387:2020 Standard. in Health Physics, 125(3), 186-197.
https://doi.org/10.1097/HP.0000000000001711

Kržanović N, Stanković-Petrović JS, Živanović M, Krajinović M, Božović P, Kojić A, Topalović D. Characterization of Thermoluminescent Dosimetry Systems According to the IEC 62387:2020 Standard. in Health Physics. 2023;125(3):186-197.
doi:10.1097/HP.0000000000001711 .

Kržanović, Nikola, Stanković-Petrović, Jelena S., Živanović, Miloš, Krajinović, Marko, Božović, Predrag, Kojić, Andrea, Topalović, Dušan, "Characterization of Thermoluminescent Dosimetry Systems According to the IEC 62387:2020 Standard" in Health Physics, 125, no. 3 (2023):186-197,
https://doi.org/10.1097/HP.0000000000001711 . .

TY  - CONF
AU  - Djozlija, Ljubica
AU  - Nikolov, Jovana
AU  - Božović, Predrag
AU  - Kržanović, Nikola
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11948
PB  - University Novi Sad : Faculty of Sciences
C3  - AAMPM : 11th Alpe Adria Medical Physics Conference : Proceedings book
T1  - Experimental verification of lead free gloves that can be used in interventional radiology
SP  - 223
EP  - 224
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11948
ER  - 

@conference{
author = "Djozlija, Ljubica and Nikolov, Jovana and Božović, Predrag and Kržanović, Nikola",
year = "2023",
publisher = "University Novi Sad : Faculty of Sciences",
journal = "AAMPM : 11th Alpe Adria Medical Physics Conference : Proceedings book",
title = "Experimental verification of lead free gloves that can be used in interventional radiology",
pages = "223-224",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11948"
}

Djozlija, L., Nikolov, J., Božović, P.,& Kržanović, N.. (2023). Experimental verification of lead free gloves that can be used in interventional radiology. in AAMPM : 11th Alpe Adria Medical Physics Conference : Proceedings book
University Novi Sad : Faculty of Sciences., 223-224.
https://hdl.handle.net/21.15107/rcub_vinar_11948

Djozlija L, Nikolov J, Božović P, Kržanović N. Experimental verification of lead free gloves that can be used in interventional radiology. in AAMPM : 11th Alpe Adria Medical Physics Conference : Proceedings book. 2023;:223-224.
https://hdl.handle.net/21.15107/rcub_vinar_11948 .

Djozlija, Ljubica, Nikolov, Jovana, Božović, Predrag, Kržanović, Nikola, "Experimental verification of lead free gloves that can be used in interventional radiology" in AAMPM : 11th Alpe Adria Medical Physics Conference : Proceedings book (2023):223-224,
https://hdl.handle.net/21.15107/rcub_vinar_11948 .

TY  - CONF
AU  - Molnar, Una
AU  - Hornjak, Dejana
AU  - Nikolov, Jovana
AU  - Božović, Predrag
AU  - Todorović, Nataša
AU  - Stojanović, Sanja
AU  - Till, Viktor
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11114
AB  - Quality control (QC) guidelines published by the IAEA, American College of Radiology, European Commission, and other authorities have demonstrated that regular QC testing of radiographic facilities, involving daily or weekly tests, effectively contributes to patient radiation exposure reduction and improvement of image quality. Often lack of staff qualified to effectively perform and analyze testing results, and needed resources (phantoms, measuring equipment) leads to poor QC practice and detection in system performance deficiencies only after they become clinically significant. New IAEA publication offers a solution with simple, inexpensive test objects which, using the advantages of computer networking, can allow the collection of data in a harmonized manner. The creation of a centralized data system should ensure consistency, easier evaluation, and comparison between different systems. The aim of this study was to implement the newly proposed QC program and test the available radiographic equipment for short-term fluctuations of some critical components of the imaging chain to ensure consistent system performance, clinically adequate image quality, and increase patient safety. The measurement was performed at the University Clinical Center of Vojvodina on a “home-made” phantom. The consistency of acquisition technical parameters and image quality indicators, metrics, and artifacts were assessed by generating images of the test phantom. Test phantom was formed by a uniform attenuator plate made of 10 cm × 10 cm, 2 mm thick square sheet of copper, and target plate consisted of a 5mm thick polymethyl methacrylate (PMMA) carrier, and 4mm thick aluminum and 2mm thick copper inserts, as proposed by the IAEA. Generated images were analyzed using the ATIA software available for download for all Member States via the IAEA Human Health Campus. This paper presents preliminary results of the performed QC testing with the use of a “simple” phantom designed in accordance with the IAEA Human Health Series No.39 (2021).
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Implementation of a new IAEA remote and automated quality control program for radiography equipment
SP  - 77
DO  - 10.21175/rad.spr.abstr.book.2022.0.1
ER  - 

@conference{
author = "Molnar, Una and Hornjak, Dejana and Nikolov, Jovana and Božović, Predrag and Todorović, Nataša and Stojanović, Sanja and Till, Viktor",
year = "2022",
abstract = "Quality control (QC) guidelines published by the IAEA, American College of Radiology, European Commission, and other authorities have demonstrated that regular QC testing of radiographic facilities, involving daily or weekly tests, effectively contributes to patient radiation exposure reduction and improvement of image quality. Often lack of staff qualified to effectively perform and analyze testing results, and needed resources (phantoms, measuring equipment) leads to poor QC practice and detection in system performance deficiencies only after they become clinically significant. New IAEA publication offers a solution with simple, inexpensive test objects which, using the advantages of computer networking, can allow the collection of data in a harmonized manner. The creation of a centralized data system should ensure consistency, easier evaluation, and comparison between different systems. The aim of this study was to implement the newly proposed QC program and test the available radiographic equipment for short-term fluctuations of some critical components of the imaging chain to ensure consistent system performance, clinically adequate image quality, and increase patient safety. The measurement was performed at the University Clinical Center of Vojvodina on a “home-made” phantom. The consistency of acquisition technical parameters and image quality indicators, metrics, and artifacts were assessed by generating images of the test phantom. Test phantom was formed by a uniform attenuator plate made of 10 cm × 10 cm, 2 mm thick square sheet of copper, and target plate consisted of a 5mm thick polymethyl methacrylate (PMMA) carrier, and 4mm thick aluminum and 2mm thick copper inserts, as proposed by the IAEA. Generated images were analyzed using the ATIA software available for download for all Member States via the IAEA Human Health Campus. This paper presents preliminary results of the performed QC testing with the use of a “simple” phantom designed in accordance with the IAEA Human Health Series No.39 (2021).",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Implementation of a new IAEA remote and automated quality control program for radiography equipment",
pages = "77",
doi = "10.21175/rad.spr.abstr.book.2022.0.1"
}

Molnar, U., Hornjak, D., Nikolov, J., Božović, P., Todorović, N., Stojanović, S.,& Till, V.. (2022). Implementation of a new IAEA remote and automated quality control program for radiography equipment. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 77.
https://doi.org/10.21175/rad.spr.abstr.book.2022.0.1

Molnar U, Hornjak D, Nikolov J, Božović P, Todorović N, Stojanović S, Till V. Implementation of a new IAEA remote and automated quality control program for radiography equipment. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:77.
doi:10.21175/rad.spr.abstr.book.2022.0.1 .

Molnar, Una, Hornjak, Dejana, Nikolov, Jovana, Božović, Predrag, Todorović, Nataša, Stojanović, Sanja, Till, Viktor, "Implementation of a new IAEA remote and automated quality control program for radiography equipment" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):77,
https://doi.org/10.21175/rad.spr.abstr.book.2022.0.1 . .

TY  - CONF
AU  - Božović, Predrag
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Kojić, Andrea
AU  - Siiskonen, Teemu
AU  - Blideanu, Valentin
AU  - Reetta, Nylund
AU  - Schettino, Giuseppe
AU  - Toroi, Paula
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11115
AB  - Due to constant development in radiodiagnostic and radiotherapy procedures with increasing complexity, a need for high-level coordination of the ionizing radiation metrology community was recognized to better respond to the needs of end users. In order to facilitate knowledge dissemination and improve communication between stakeholders involved in medical applications of ionizing radiation, a Joint Network Project was started in 2020. One of the specific objectives of Work Package 2 of the project 19NET04 MIRA, “Support for a European Metrology Network on the medical use of ionizing radiation” is to support the developing states, ensuring that the planned EMN is inclusive through improvements in the medical use of ionizing radiation [1]. Czech Republic, Romania and Serbia were defined as countries of interest to conduct the survey and collect relevant data from stakeholders in the category of medical staff and professionals, so that the potential for improvement for medical applications of ionizing radiation can be evaluated. For the purpose of data collection, an online questionnaire was prepared and distributed to the stakeholders. The questionnaire was structured in such a way to allow easier collection of information regarding availability of (1) calibration services; (2) documented technical protocols; (3) standard documentation in the establishments for different ionizing radiation applications. Implementation of a Quality assurance (QA) programme was investigated, as well as the consistency in realization of proficiency testing (PT) or audits. The stakeholders were asked if additional workshops or training programmes are needed in their area of expertise. The radiodiagnostic modalities included in the questionnaire were the general radiography, mammography, computed tomography and interventional procedures, while radiotherapy modalities included external beam radiotherapy (teletherapy) and brachytherapy. Although nuclear medicine (therapy and diagnostic) procedures were part of the questionnaire, none of the respondents have capabilities for these applications. Based on the information collected via the online questionnaire, calibration services are available for most of the modalities, except for brachytherapy where traceability is not established. QA and PT are regularly performed in radiotherapy, while it is not the case in radiodiagnostic modalities. Improvement in knowledge transfer is needed for all of the applications investigated. Considering the acquired information, there is a clear need for EMN to support knowledge transfer, communication and technical exchange between the metrology community and the stakeholders involved in the medical applications of ionizing radiation. The forthcoming European Metrology Network will further elaborate the knowledge dissemination and stakeholder dialogue through its stakeholder panels and joint training efforts
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Investigation on the potential of improvement in the field of medical applications of ionizing radiation via the future European Metrology Network
SP  - 78
DO  - 10.21175/rad.spr.abstr.book.2022.19.4
ER  - 

@conference{
author = "Božović, Predrag and Kržanović, Nikola and Živanović, Miloš and Kojić, Andrea and Siiskonen, Teemu and Blideanu, Valentin and Reetta, Nylund and Schettino, Giuseppe and Toroi, Paula",
year = "2022",
abstract = "Due to constant development in radiodiagnostic and radiotherapy procedures with increasing complexity, a need for high-level coordination of the ionizing radiation metrology community was recognized to better respond to the needs of end users. In order to facilitate knowledge dissemination and improve communication between stakeholders involved in medical applications of ionizing radiation, a Joint Network Project was started in 2020. One of the specific objectives of Work Package 2 of the project 19NET04 MIRA, “Support for a European Metrology Network on the medical use of ionizing radiation” is to support the developing states, ensuring that the planned EMN is inclusive through improvements in the medical use of ionizing radiation [1]. Czech Republic, Romania and Serbia were defined as countries of interest to conduct the survey and collect relevant data from stakeholders in the category of medical staff and professionals, so that the potential for improvement for medical applications of ionizing radiation can be evaluated. For the purpose of data collection, an online questionnaire was prepared and distributed to the stakeholders. The questionnaire was structured in such a way to allow easier collection of information regarding availability of (1) calibration services; (2) documented technical protocols; (3) standard documentation in the establishments for different ionizing radiation applications. Implementation of a Quality assurance (QA) programme was investigated, as well as the consistency in realization of proficiency testing (PT) or audits. The stakeholders were asked if additional workshops or training programmes are needed in their area of expertise. The radiodiagnostic modalities included in the questionnaire were the general radiography, mammography, computed tomography and interventional procedures, while radiotherapy modalities included external beam radiotherapy (teletherapy) and brachytherapy. Although nuclear medicine (therapy and diagnostic) procedures were part of the questionnaire, none of the respondents have capabilities for these applications. Based on the information collected via the online questionnaire, calibration services are available for most of the modalities, except for brachytherapy where traceability is not established. QA and PT are regularly performed in radiotherapy, while it is not the case in radiodiagnostic modalities. Improvement in knowledge transfer is needed for all of the applications investigated. Considering the acquired information, there is a clear need for EMN to support knowledge transfer, communication and technical exchange between the metrology community and the stakeholders involved in the medical applications of ionizing radiation. The forthcoming European Metrology Network will further elaborate the knowledge dissemination and stakeholder dialogue through its stakeholder panels and joint training efforts",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Investigation on the potential of improvement in the field of medical applications of ionizing radiation via the future European Metrology Network",
pages = "78",
doi = "10.21175/rad.spr.abstr.book.2022.19.4"
}

Božović, P., Kržanović, N., Živanović, M., Kojić, A., Siiskonen, T., Blideanu, V., Reetta, N., Schettino, G.,& Toroi, P.. (2022). Investigation on the potential of improvement in the field of medical applications of ionizing radiation via the future European Metrology Network. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 78.
https://doi.org/10.21175/rad.spr.abstr.book.2022.19.4

Božović P, Kržanović N, Živanović M, Kojić A, Siiskonen T, Blideanu V, Reetta N, Schettino G, Toroi P. Investigation on the potential of improvement in the field of medical applications of ionizing radiation via the future European Metrology Network. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:78.
doi:10.21175/rad.spr.abstr.book.2022.19.4 .

Božović, Predrag, Kržanović, Nikola, Živanović, Miloš, Kojić, Andrea, Siiskonen, Teemu, Blideanu, Valentin, Reetta, Nylund, Schettino, Giuseppe, Toroi, Paula, "Investigation on the potential of improvement in the field of medical applications of ionizing radiation via the future European Metrology Network" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):78,
https://doi.org/10.21175/rad.spr.abstr.book.2022.19.4 . .

TY  - CONF
AU  - Stanković-Petrović, Jelena S.
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Topalović, Dušan
AU  - Kojić, Andrea
AU  - Božović, Predrag
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11118
AB  - The regular participation of an accredited individual monitoring service (IMS) in the international and/or interlaboratory intercomparisons (IC) is required according to ISO/IEC 17025:2017 standard, General requirements for the competence of testing and calibration laboratories. By taking the part in an IC, IMS shows competence, reliability, and has an opportunity to learn further and improve its measurement method. The European Dosimetry Group (EURADOS) Working Group 2 (WG2) has acknowledged the value of the regular IC and also found that data and results from it are fundamental for the harmonization of the measurement process [1]. Thus, EURADOS started a self-sustained program of IC for IMS for external radiation on a biannual basis. The results of an accredited IMS at the Department of Radiation and Environmental Protection, “VINČA” Institute of Nuclear Sciences, Belgrade, Serbia (IMS VINS) in the EURADOS IC for the period 2010-2020 (excluding 2014) are presented. IMS VINS use thermoluminescent whole body dosemeters based on two TLD-100TM (Thermo Scientific™ Harshaw™, USA) detectors. The readouts are done on the Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA). The whole glow curve is used for dose estimation (all of 200 channels). The calibration of the dosimetric system is done twice a year in S-Cs (previously in S-Co) field at the secondary standard dosimetry laboratory (SSDL VINS), according to ISO 4037-3:2019. The IC had 40 different reference values of personal dose equivalent, Hp(10) in noted period ranging from 0.431 mSv to 501 mSv. There were 20, 16, 22, 22, 20 dosemeters irradiated in year 2010, 2012, 2016, 2018, 2020, respectively. The radiations were done in 12 different fields: N-60, S-Co, S-Cs, N-40, N-150, S-Cs+Sr90, S-Cs+N-40, W-110, S-Cs+W-250, W-60, S-Cs+W-80, and S-Cs+N-150. The relative response (R) range is from 0.23 to 2.26. Quantile values for R are: 0.23, 0.79, 0.90, 1.1, and 2.26, respectively for (0%, 25 %, 50 %, 75 % and 100 % of points). Mean and standard deviation of R are 0.97 and 0.30, respectively. The performance limits are established according to ISO 14146 trumpet-curve [1]. Due to trumpet-curve there were 6 outliers (2 in 2010, 4 in 2016). All of the outliers were for reference dose around 1 mSv and lower. One outlier from 2010 was irradiated in N-40 field and 30° of incident angle. The other outlier was irradiated in the S-Cs field, without any rotation, and thus should have had a satisfying response. The possible explanation is an insensitive TL detector. The outliers in 2016 were all for N-40 quality and ±60° angle. Thus, considering the low number of outliers (only one true outlier) and expected dosemeters faulty response for given irradiation parameters, we conclude that the IMS VINS dosimetry system had satisfactory behavior during IC from 2010-2020.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Results of IMS participation in international intercomparisons for whole body dosemeters – 10 years of study
SP  - 129
DO  - 10.21175/rad.spr.abstr.book.2022.28.3
ER  - 

@conference{
author = "Stanković-Petrović, Jelena S. and Kržanović, Nikola and Živanović, Miloš and Topalović, Dušan and Kojić, Andrea and Božović, Predrag",
year = "2022",
abstract = "The regular participation of an accredited individual monitoring service (IMS) in the international and/or interlaboratory intercomparisons (IC) is required according to ISO/IEC 17025:2017 standard, General requirements for the competence of testing and calibration laboratories. By taking the part in an IC, IMS shows competence, reliability, and has an opportunity to learn further and improve its measurement method. The European Dosimetry Group (EURADOS) Working Group 2 (WG2) has acknowledged the value of the regular IC and also found that data and results from it are fundamental for the harmonization of the measurement process [1]. Thus, EURADOS started a self-sustained program of IC for IMS for external radiation on a biannual basis. The results of an accredited IMS at the Department of Radiation and Environmental Protection, “VINČA” Institute of Nuclear Sciences, Belgrade, Serbia (IMS VINS) in the EURADOS IC for the period 2010-2020 (excluding 2014) are presented. IMS VINS use thermoluminescent whole body dosemeters based on two TLD-100TM (Thermo Scientific™ Harshaw™, USA) detectors. The readouts are done on the Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA). The whole glow curve is used for dose estimation (all of 200 channels). The calibration of the dosimetric system is done twice a year in S-Cs (previously in S-Co) field at the secondary standard dosimetry laboratory (SSDL VINS), according to ISO 4037-3:2019. The IC had 40 different reference values of personal dose equivalent, Hp(10) in noted period ranging from 0.431 mSv to 501 mSv. There were 20, 16, 22, 22, 20 dosemeters irradiated in year 2010, 2012, 2016, 2018, 2020, respectively. The radiations were done in 12 different fields: N-60, S-Co, S-Cs, N-40, N-150, S-Cs+Sr90, S-Cs+N-40, W-110, S-Cs+W-250, W-60, S-Cs+W-80, and S-Cs+N-150. The relative response (R) range is from 0.23 to 2.26. Quantile values for R are: 0.23, 0.79, 0.90, 1.1, and 2.26, respectively for (0%, 25 %, 50 %, 75 % and 100 % of points). Mean and standard deviation of R are 0.97 and 0.30, respectively. The performance limits are established according to ISO 14146 trumpet-curve [1]. Due to trumpet-curve there were 6 outliers (2 in 2010, 4 in 2016). All of the outliers were for reference dose around 1 mSv and lower. One outlier from 2010 was irradiated in N-40 field and 30° of incident angle. The other outlier was irradiated in the S-Cs field, without any rotation, and thus should have had a satisfying response. The possible explanation is an insensitive TL detector. The outliers in 2016 were all for N-40 quality and ±60° angle. Thus, considering the low number of outliers (only one true outlier) and expected dosemeters faulty response for given irradiation parameters, we conclude that the IMS VINS dosimetry system had satisfactory behavior during IC from 2010-2020.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Results of IMS participation in international intercomparisons for whole body dosemeters – 10 years of study",
pages = "129",
doi = "10.21175/rad.spr.abstr.book.2022.28.3"
}

Stanković-Petrović, J. S., Kržanović, N., Živanović, M., Topalović, D., Kojić, A.,& Božović, P.. (2022). Results of IMS participation in international intercomparisons for whole body dosemeters – 10 years of study. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 129.
https://doi.org/10.21175/rad.spr.abstr.book.2022.28.3

Stanković-Petrović JS, Kržanović N, Živanović M, Topalović D, Kojić A, Božović P. Results of IMS participation in international intercomparisons for whole body dosemeters – 10 years of study. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:129.
doi:10.21175/rad.spr.abstr.book.2022.28.3 .

Stanković-Petrović, Jelena S., Kržanović, Nikola, Živanović, Miloš, Topalović, Dušan, Kojić, Andrea, Božović, Predrag, "Results of IMS participation in international intercomparisons for whole body dosemeters – 10 years of study" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):129,
https://doi.org/10.21175/rad.spr.abstr.book.2022.28.3 . .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Božović, Predrag
AU  - Živanović, Miloš
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11119
AB  - In mammography clinical practice, various radiation fields are used, produced using different X-ray tube anode and filtration setups. It is important to calibrate diagnostic dosimeters in different radiation qualities as these dosimeters are used for quality control tests and most dosimeters have significant dependence of response on radiation spectra. TRS 457 Code of Practice [1] is an IAEA document which recommends calibration of diagnostic dosimeters in reference radiation fields established according to IEC 61267:2005 international standard [2], which considers the Mo/Mo anode-filter combination (abbreviated as the RQR-M series). Other, non-standard beam qualities are also used for calibration, such as the beams with W/Al anode-filter combination, used by Vinca Institute Secondary Standard Dosimetry Laboratory. Traceability is established to IAEA Dosimetry Laboratory, and radiation qualities are established by adding 0.5 mm Al additional filtration, following the IAEA procedure [3]. Mammography radiation qualities can be validated by determining the half-value layer (HVL) of the radiation beam. To determine HVL we measured incident air kerma at 1 m distance using a 1 cm3 plane parallel ionization chamber, by successively adding Al attenuators of different thickness. The Al attenuators have been placed at 0.5 m distance, equidistantly from the radiation source and the ionization chamber. HVL was obtained using a linear regression for the additional filtration values near the expected HVL value. Calculated HVL was 0.326 mm Al, 0.367 mm Al, 0.395 mm Al, 0.456 mm Al for tube voltages 25 kV, 28 kV, 30 kV and 35 kV, respectively. The results were compared with the values given by IAEA SSDL [3] (deviation for all qualities was less than 5%) and PTB Primary Standard Dosimetry Laboratory (PSDL) [4]. Radiation qualities established in this manner allow proper calibration and traceability of diagnostic dosimeters in W/Al radiation qualities to be used for routine QC tests in mammography.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Establishing W/Al mammography radiation qualities in Secondary Standard Dosimetry Laboratory
SP  - 142
DO  - 10.21175/rad.spr.abstr.book.2022.28.16
ER  - 

@conference{
author = "Kržanović, Nikola and Božović, Predrag and Živanović, Miloš",
year = "2022",
abstract = "In mammography clinical practice, various radiation fields are used, produced using different X-ray tube anode and filtration setups. It is important to calibrate diagnostic dosimeters in different radiation qualities as these dosimeters are used for quality control tests and most dosimeters have significant dependence of response on radiation spectra. TRS 457 Code of Practice [1] is an IAEA document which recommends calibration of diagnostic dosimeters in reference radiation fields established according to IEC 61267:2005 international standard [2], which considers the Mo/Mo anode-filter combination (abbreviated as the RQR-M series). Other, non-standard beam qualities are also used for calibration, such as the beams with W/Al anode-filter combination, used by Vinca Institute Secondary Standard Dosimetry Laboratory. Traceability is established to IAEA Dosimetry Laboratory, and radiation qualities are established by adding 0.5 mm Al additional filtration, following the IAEA procedure [3]. Mammography radiation qualities can be validated by determining the half-value layer (HVL) of the radiation beam. To determine HVL we measured incident air kerma at 1 m distance using a 1 cm3 plane parallel ionization chamber, by successively adding Al attenuators of different thickness. The Al attenuators have been placed at 0.5 m distance, equidistantly from the radiation source and the ionization chamber. HVL was obtained using a linear regression for the additional filtration values near the expected HVL value. Calculated HVL was 0.326 mm Al, 0.367 mm Al, 0.395 mm Al, 0.456 mm Al for tube voltages 25 kV, 28 kV, 30 kV and 35 kV, respectively. The results were compared with the values given by IAEA SSDL [3] (deviation for all qualities was less than 5%) and PTB Primary Standard Dosimetry Laboratory (PSDL) [4]. Radiation qualities established in this manner allow proper calibration and traceability of diagnostic dosimeters in W/Al radiation qualities to be used for routine QC tests in mammography.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Establishing W/Al mammography radiation qualities in Secondary Standard Dosimetry Laboratory",
pages = "142",
doi = "10.21175/rad.spr.abstr.book.2022.28.16"
}

Kržanović, N., Božović, P.,& Živanović, M.. (2022). Establishing W/Al mammography radiation qualities in Secondary Standard Dosimetry Laboratory. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 142.
https://doi.org/10.21175/rad.spr.abstr.book.2022.28.16

Kržanović N, Božović P, Živanović M. Establishing W/Al mammography radiation qualities in Secondary Standard Dosimetry Laboratory. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:142.
doi:10.21175/rad.spr.abstr.book.2022.28.16 .

Kržanović, Nikola, Božović, Predrag, Živanović, Miloš, "Establishing W/Al mammography radiation qualities in Secondary Standard Dosimetry Laboratory" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):142,
https://doi.org/10.21175/rad.spr.abstr.book.2022.28.16 . .

TY  - CONF
AU  - Kojić, Andrea
AU  - Božović, Predrag
AU  - Kržanović, Nikola
AU  - Stanković-Petrović, Jelena S.
AU  - Živanović, Miloš Z.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10089
AB  - Primena jonizujućeg zračenja u medicini je neizbežan deo moderne medicinske dijagnostike. S obzirom na globalni porast izlaganja zračenju u medicinske svrhe raste i potreba za optimizacijom doza koje se isporučuju pacijentu. U dijagnostičkoj radiologiji doza koja se isporučuje pacijentu može se proceniti ulaznom dozom na površini kože (Entrance Surface Air Kerma) i jedan od metoda za dobijanje ESAK jeste proračun na osnovu vrednosti radijacionog izlaza. Radijacioni izlaz može se izmeriti ili dobiti proračunom pomoću matematičkih formula ili Monte Karlo simulacijama. U ovom radu izmeren je radijacioni izlaz za 15 različitih rendgen-aparata i izračunati su parametri u matematičkoj formuli kako bi se dobio precizniji model za radijacioni izlaz. Rezultati su upoređeni sa rezultatima Monte Karlo simulacija, kao i sa rezultatima dobijenim u sličnim studijama.
AB  - Application of ionizing radiation in medicine is an inseparable part of modern medical diagnostics. With increasing number of medical exposures in the world the need for optimization of doses delivered to patients arises. Doses delivered to the patient in diagnostic radiology can be estimated with Entrance Surface Air Kerma, where one of the methods for obtaining ESAK is the calculation based on radiation output. Furthermore, radiation output can be measured or calculated using mathematical formulas or Monte Carlo simulations. In this paper we measured radiation output for 15 different x-ray devices and calculated parameters for mathematical formula to obtain a more accurate model for radiation output. These results were compared with the results of Monte Carlo simulations and the results obtained in similar studies.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Procena vrednosti parametara matematičkog modela za radijacioni izlaz rendgen-aparata u dijagnostičkoj radiologiji
T1  - Optimization of Radiation Output Mathematical Model Parameters for X-Ray Devices Used in Diagnostic Radiology
SP  - 229
EP  - 234
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10089
ER  - 

@conference{
author = "Kojić, Andrea and Božović, Predrag and Kržanović, Nikola and Stanković-Petrović, Jelena S. and Živanović, Miloš Z.",
year = "2021",
abstract = "Primena jonizujućeg zračenja u medicini je neizbežan deo moderne medicinske dijagnostike. S obzirom na globalni porast izlaganja zračenju u medicinske svrhe raste i potreba za optimizacijom doza koje se isporučuju pacijentu. U dijagnostičkoj radiologiji doza koja se isporučuje pacijentu može se proceniti ulaznom dozom na površini kože (Entrance Surface Air Kerma) i jedan od metoda za dobijanje ESAK jeste proračun na osnovu vrednosti radijacionog izlaza. Radijacioni izlaz može se izmeriti ili dobiti proračunom pomoću matematičkih formula ili Monte Karlo simulacijama. U ovom radu izmeren je radijacioni izlaz za 15 različitih rendgen-aparata i izračunati su parametri u matematičkoj formuli kako bi se dobio precizniji model za radijacioni izlaz. Rezultati su upoređeni sa rezultatima Monte Karlo simulacija, kao i sa rezultatima dobijenim u sličnim studijama., Application of ionizing radiation in medicine is an inseparable part of modern medical diagnostics. With increasing number of medical exposures in the world the need for optimization of doses delivered to patients arises. Doses delivered to the patient in diagnostic radiology can be estimated with Entrance Surface Air Kerma, where one of the methods for obtaining ESAK is the calculation based on radiation output. Furthermore, radiation output can be measured or calculated using mathematical formulas or Monte Carlo simulations. In this paper we measured radiation output for 15 different x-ray devices and calculated parameters for mathematical formula to obtain a more accurate model for radiation output. These results were compared with the results of Monte Carlo simulations and the results obtained in similar studies.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Procena vrednosti parametara matematičkog modela za radijacioni izlaz rendgen-aparata u dijagnostičkoj radiologiji, Optimization of Radiation Output Mathematical Model Parameters for X-Ray Devices Used in Diagnostic Radiology",
pages = "229-234",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10089"
}

Kojić, A., Božović, P., Kržanović, N., Stanković-Petrović, J. S.,& Živanović, M. Z.. (2021). Procena vrednosti parametara matematičkog modela za radijacioni izlaz rendgen-aparata u dijagnostičkoj radiologiji. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 229-234.
https://hdl.handle.net/21.15107/rcub_vinar_10089

Kojić A, Božović P, Kržanović N, Stanković-Petrović JS, Živanović MZ. Procena vrednosti parametara matematičkog modela za radijacioni izlaz rendgen-aparata u dijagnostičkoj radiologiji. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:229-234.
https://hdl.handle.net/21.15107/rcub_vinar_10089 .

Kojić, Andrea, Božović, Predrag, Kržanović, Nikola, Stanković-Petrović, Jelena S., Živanović, Miloš Z., "Procena vrednosti parametara matematičkog modela za radijacioni izlaz rendgen-aparata u dijagnostičkoj radiologiji" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):229-234,
https://hdl.handle.net/21.15107/rcub_vinar_10089 .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Blideanu, Valentin
AU  - Kojić, Andrea
AU  - Božović, Predrag
AU  - Živanović, Miloš Z.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10090
AB  - The 19NET04 MIRA Joint Network Project is a project within the EMPIR 2019 call. The main objectives of the project are to establish stakeholder dialogue, to develop the Strategic Research Agenda for the medical use of ionising radiation, to define how current European metrological services meet regulatory and stakeholder needs, to set up a knowledge-sharing programme for the stakeholders and to develop a plan for the European metrology research infrastructure via the European Metrology Network. The project addresses the strong need for a coordinated action on an international level in the different fields of ionising radiation which include medical applications, radiobiology and radiation protection.
AB  - Projekat za uspostavljanje metrološke mreže 19NET04 MIRA predstavlja međunarodni projekat u okviru EMPIR 2019 poziva. Glavni ciljevi projekta jesu uspostavljanje dijaloga interesenata (stejkholdera), stvaranje strateškog plana razvoja za medicinske primene jonizujućeg zračenja, ispitivanje u kojoj meri trenutne metrološke mogućnosti evropskih instituta zadovoljavaju potrebe regulatornih tela i interesanata, postavljanje programa razmene znanja i razvoj plana za evropsku metrološku infrastrukturu putem evropske metrološke mreže. Projekat će dati odgovor na potrebu za koordiniranim aktivnostima na međunarodnom nivou u različitim oblastima primene jonizujućeg zračenja u medicini, radiobiologiji i zaštiti od zračenja.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - EMPIR Project 19NET04 MIRA – Joint Network Project Significance
T1  - EMPIR projekat 19NET04 MIRA – značaj projekta za uspostavljanje metrološke mreže
SP  - 236
EP  - 239
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10090
ER  - 

@conference{
author = "Kržanović, Nikola and Blideanu, Valentin and Kojić, Andrea and Božović, Predrag and Živanović, Miloš Z.",
year = "2021",
abstract = "The 19NET04 MIRA Joint Network Project is a project within the EMPIR 2019 call. The main objectives of the project are to establish stakeholder dialogue, to develop the Strategic Research Agenda for the medical use of ionising radiation, to define how current European metrological services meet regulatory and stakeholder needs, to set up a knowledge-sharing programme for the stakeholders and to develop a plan for the European metrology research infrastructure via the European Metrology Network. The project addresses the strong need for a coordinated action on an international level in the different fields of ionising radiation which include medical applications, radiobiology and radiation protection., Projekat za uspostavljanje metrološke mreže 19NET04 MIRA predstavlja međunarodni projekat u okviru EMPIR 2019 poziva. Glavni ciljevi projekta jesu uspostavljanje dijaloga interesenata (stejkholdera), stvaranje strateškog plana razvoja za medicinske primene jonizujućeg zračenja, ispitivanje u kojoj meri trenutne metrološke mogućnosti evropskih instituta zadovoljavaju potrebe regulatornih tela i interesanata, postavljanje programa razmene znanja i razvoj plana za evropsku metrološku infrastrukturu putem evropske metrološke mreže. Projekat će dati odgovor na potrebu za koordiniranim aktivnostima na međunarodnom nivou u različitim oblastima primene jonizujućeg zračenja u medicini, radiobiologiji i zaštiti od zračenja.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "EMPIR Project 19NET04 MIRA – Joint Network Project Significance, EMPIR projekat 19NET04 MIRA – značaj projekta za uspostavljanje metrološke mreže",
pages = "236-239",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10090"
}

Kržanović, N., Blideanu, V., Kojić, A., Božović, P.,& Živanović, M. Z.. (2021). EMPIR Project 19NET04 MIRA – Joint Network Project Significance. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 236-239.
https://hdl.handle.net/21.15107/rcub_vinar_10090

Kržanović N, Blideanu V, Kojić A, Božović P, Živanović MZ. EMPIR Project 19NET04 MIRA – Joint Network Project Significance. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:236-239.
https://hdl.handle.net/21.15107/rcub_vinar_10090 .

Kržanović, Nikola, Blideanu, Valentin, Kojić, Andrea, Božović, Predrag, Živanović, Miloš Z., "EMPIR Project 19NET04 MIRA – Joint Network Project Significance" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):236-239,
https://hdl.handle.net/21.15107/rcub_vinar_10090 .

TY  - CONF
AU  - Jović, Mihajlo D.
AU  - Smičiklas, Ivana D.
AU  - Šipka, Nenad
AU  - Stojanović, Živojin
AU  - Božović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10120
AB  - Naftna industrija je jedan od najvećih proizvođača TENORM materijala u Srbiji, kao i u svetu. Usled značajnih promena temperature i pritiska, transport nafte i gasa iz geoloških rezervoara izaziva taloženje primordijalnih radionuklida i drugih materija unutar transportnih cevi do nivoa povećane radioaktivnosti, koja zahteva sprovođenje mera bezbednosti i zaštite od zračenja. Najveća aktivnost u depozitu-kamencu i mulju potiče od 226Ra, sa vremenom poluraspada od 1600 godina. U ovom radu razmatrane su prednosti i nedostaci postojećih hemijskih i fizičko/mehaničkih metoda dekontaminacije, u svetlu iskustava iz prakse. Unapređenje tehnologija za dekontaminaciju cevnih materijala sa povišenom radioaktivnošću i dalje predstavlja izazov, a glavni cilj je razvoj efikasnih, ekonomičnih i ekološki prihvatljivih rešenja, bez ili sa generisanjem što manje količine sekundarnog otpada. U tom smislu, razvoj i optimizacija metoda baziraih na primeni peleta suvog leda u kombinaciji sa komprimovanim vazduhom, zaslužuju posebnu pažnju.
AB  - The oil industry is one of the largest producers of TENORM materials in Serbia and on a global level. Due to significant changes in temperature and pressure, the transport of oil and gas from geological reservoirs causes the deposition of primordial radionuclides and other substances within the transport pipes to the level of increased radioactivity that requires the implementation of safety and radiation protection measures. The highest activity in scale and sludge deposits originates from 226Ra, with a half-life of 1600 years. This paper discusses the advantages and disadvantages of existing chemical and physical/mechanical decontamination methods in the light of practical experience. Improving technologies for decontamination of pipe materials with increased radioactivity remains a challenge, and the main goal is to develop efficient, economical, and environmentally friendly solutions without or with the generation of as little secondary waste as possible. In this sense, the development and optimization of methods based on the application of dry ice pellets in combination with compressed air deserve special attention.
PB  - Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 31. симпозијум ДЗЗСЦГ : зборник радова
T1  - Dekontaminacija cevnog materijala tehnološki obogaćenog primordijalnim radionuklidima
T1  - Decontamination of Pipe Material Technologically Enriched with Primordial Radionuclides
SP  - 262
EP  - 268
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10120
ER  - 

@conference{
author = "Jović, Mihajlo D. and Smičiklas, Ivana D. and Šipka, Nenad and Stojanović, Živojin and Božović, Predrag",
year = "2021",
abstract = "Naftna industrija je jedan od najvećih proizvođača TENORM materijala u Srbiji, kao i u svetu. Usled značajnih promena temperature i pritiska, transport nafte i gasa iz geoloških rezervoara izaziva taloženje primordijalnih radionuklida i drugih materija unutar transportnih cevi do nivoa povećane radioaktivnosti, koja zahteva sprovođenje mera bezbednosti i zaštite od zračenja. Najveća aktivnost u depozitu-kamencu i mulju potiče od 226Ra, sa vremenom poluraspada od 1600 godina. U ovom radu razmatrane su prednosti i nedostaci postojećih hemijskih i fizičko/mehaničkih metoda dekontaminacije, u svetlu iskustava iz prakse. Unapređenje tehnologija za dekontaminaciju cevnih materijala sa povišenom radioaktivnošću i dalje predstavlja izazov, a glavni cilj je razvoj efikasnih, ekonomičnih i ekološki prihvatljivih rešenja, bez ili sa generisanjem što manje količine sekundarnog otpada. U tom smislu, razvoj i optimizacija metoda baziraih na primeni peleta suvog leda u kombinaciji sa komprimovanim vazduhom, zaslužuju posebnu pažnju., The oil industry is one of the largest producers of TENORM materials in Serbia and on a global level. Due to significant changes in temperature and pressure, the transport of oil and gas from geological reservoirs causes the deposition of primordial radionuclides and other substances within the transport pipes to the level of increased radioactivity that requires the implementation of safety and radiation protection measures. The highest activity in scale and sludge deposits originates from 226Ra, with a half-life of 1600 years. This paper discusses the advantages and disadvantages of existing chemical and physical/mechanical decontamination methods in the light of practical experience. Improving technologies for decontamination of pipe materials with increased radioactivity remains a challenge, and the main goal is to develop efficient, economical, and environmentally friendly solutions without or with the generation of as little secondary waste as possible. In this sense, the development and optimization of methods based on the application of dry ice pellets in combination with compressed air deserve special attention.",
publisher = "Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "31. симпозијум ДЗЗСЦГ : зборник радова",
title = "Dekontaminacija cevnog materijala tehnološki obogaćenog primordijalnim radionuklidima, Decontamination of Pipe Material Technologically Enriched with Primordial Radionuclides",
pages = "262-268",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10120"
}

Jović, M. D., Smičiklas, I. D., Šipka, N., Stojanović, Ž.,& Božović, P.. (2021). Dekontaminacija cevnog materijala tehnološki obogaćenog primordijalnim radionuklidima. in 31. симпозијум ДЗЗСЦГ : зборник радова
Institut za nuklearne nauke "Vinča"., 262-268.
https://hdl.handle.net/21.15107/rcub_vinar_10120

Jović MD, Smičiklas ID, Šipka N, Stojanović Ž, Božović P. Dekontaminacija cevnog materijala tehnološki obogaćenog primordijalnim radionuklidima. in 31. симпозијум ДЗЗСЦГ : зборник радова. 2021;:262-268.
https://hdl.handle.net/21.15107/rcub_vinar_10120 .

Jović, Mihajlo D., Smičiklas, Ivana D., Šipka, Nenad, Stojanović, Živojin, Božović, Predrag, "Dekontaminacija cevnog materijala tehnološki obogaćenog primordijalnim radionuklidima" in 31. симпозијум ДЗЗСЦГ : зборник радова (2021):262-268,
https://hdl.handle.net/21.15107/rcub_vinar_10120 .

TY  - JOUR
AU  - Apostolakopoulos, Filip Haralambos
AU  - Kržanović, Nikola
AU  - Božović, Predrag
AU  - Stanković, Koviljka
AU  - Perazić, Luka
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10275
AB  - The aim of this paper is to examine the energy and angular responses of thermoluminescent (LiF:Mg,Ti and LiF:Mg,Cu,P) and optically stimulated luminescent (Al2O3:C) dosimeters with experimental measurements and Monte Carlo simulations. Nine radiation qualities, with mean energies ranging from 33 keV to 1.25 MeV, and five angles of incidence, between 0° and 80°, were used to conduct this analysis. The IEC 62387:2020 international radiation protection standard was used as the dosimeter response measure of quality. The experimental and simulated data exhibit that the dosimeter responses meet the standard's criteria, with certain exceptions on lower energies.
T2  - Nuclear Technology and Radiation Protection
T1  - Comparison of experimental and simulated responses of TL and OSL dosimeters in poly-energetic and multi-directional photon radiation fields
VL  - 36
IS  - 4
SP  - 329
EP  - 337
DO  - 10.2298/NTRP2104329A
ER  - 

@article{
author = "Apostolakopoulos, Filip Haralambos and Kržanović, Nikola and Božović, Predrag and Stanković, Koviljka and Perazić, Luka",
year = "2021",
abstract = "The aim of this paper is to examine the energy and angular responses of thermoluminescent (LiF:Mg,Ti and LiF:Mg,Cu,P) and optically stimulated luminescent (Al2O3:C) dosimeters with experimental measurements and Monte Carlo simulations. Nine radiation qualities, with mean energies ranging from 33 keV to 1.25 MeV, and five angles of incidence, between 0° and 80°, were used to conduct this analysis. The IEC 62387:2020 international radiation protection standard was used as the dosimeter response measure of quality. The experimental and simulated data exhibit that the dosimeter responses meet the standard's criteria, with certain exceptions on lower energies.",
journal = "Nuclear Technology and Radiation Protection",
title = "Comparison of experimental and simulated responses of TL and OSL dosimeters in poly-energetic and multi-directional photon radiation fields",
volume = "36",
number = "4",
pages = "329-337",
doi = "10.2298/NTRP2104329A"
}

Apostolakopoulos, F. H., Kržanović, N., Božović, P., Stanković, K.,& Perazić, L.. (2021). Comparison of experimental and simulated responses of TL and OSL dosimeters in poly-energetic and multi-directional photon radiation fields. in Nuclear Technology and Radiation Protection, 36(4), 329-337.
https://doi.org/10.2298/NTRP2104329A

Apostolakopoulos FH, Kržanović N, Božović P, Stanković K, Perazić L. Comparison of experimental and simulated responses of TL and OSL dosimeters in poly-energetic and multi-directional photon radiation fields. in Nuclear Technology and Radiation Protection. 2021;36(4):329-337.
doi:10.2298/NTRP2104329A .

Apostolakopoulos, Filip Haralambos, Kržanović, Nikola, Božović, Predrag, Stanković, Koviljka, Perazić, Luka, "Comparison of experimental and simulated responses of TL and OSL dosimeters in poly-energetic and multi-directional photon radiation fields" in Nuclear Technology and Radiation Protection, 36, no. 4 (2021):329-337,
https://doi.org/10.2298/NTRP2104329A . .

TY  - CONF
AU  - Topalović, Dušan
AU  - Arsoski, V. V.
AU  - Tadić, M. Ž.
AU  - Radenković, M.
AU  - Božović, Predrag
AU  - Peeters, F. M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10903
AB  - HgTe is a II-VI compound semi-metal with inverted band ordering, low effective mass and high electron mobility [1]. Nanostructures based on this compound are intensively studied due to their specific topological properties [2]. In HgTe based nanostructures an inversion in the band ordering is accompanied by a quantum phase transition from a normal insulator to the phase of a nontrivial twodimensional (2D) topological insulator or the Quantum Spin Hall insulator [3]. A good dynamic stability of HgTe monolayer is predicted from first-principles methods [4], which opened the possibility to use this material in thin-layer electronic devices. Even before these theoretical findings, HgTe nanoribbons have been experimentally realized [5], and a topological field effect quantum transistor was proposed [6]. We investigate the electronic and transport properties of low-buckled 2D HgTe zig-zag and armchair nanoribbons. Modeling of electronic states was performed by using a single-particle tight-binding model in the nearest-neighbour approximation [7]. The sp3d 5 s * basis set in the Slater-Koster notation was used. The spin-orbit interaction was included in the model by using the Chadi formalism [8]. We found specific edge states in the range of energies that define the fundamental band gap of 2D HgTe monolayer. Moreover, we show that the electronic and transport properties of these states depend strongly on nanoribbon width and type of edge, and we demonstrate how external fields can be employed to control them.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
T1  - Influence of boundary conditions on electronic and transport properties in monolayer low – buckled HgTe nanoribbons
SP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10903
ER  - 

@conference{
author = "Topalović, Dušan and Arsoski, V. V. and Tadić, M. Ž. and Radenković, M. and Božović, Predrag and Peeters, F. M.",
year = "2021",
abstract = "HgTe is a II-VI compound semi-metal with inverted band ordering, low effective mass and high electron mobility [1]. Nanostructures based on this compound are intensively studied due to their specific topological properties [2]. In HgTe based nanostructures an inversion in the band ordering is accompanied by a quantum phase transition from a normal insulator to the phase of a nontrivial twodimensional (2D) topological insulator or the Quantum Spin Hall insulator [3]. A good dynamic stability of HgTe monolayer is predicted from first-principles methods [4], which opened the possibility to use this material in thin-layer electronic devices. Even before these theoretical findings, HgTe nanoribbons have been experimentally realized [5], and a topological field effect quantum transistor was proposed [6]. We investigate the electronic and transport properties of low-buckled 2D HgTe zig-zag and armchair nanoribbons. Modeling of electronic states was performed by using a single-particle tight-binding model in the nearest-neighbour approximation [7]. The sp3d 5 s * basis set in the Slater-Koster notation was used. The spin-orbit interaction was included in the model by using the Chadi formalism [8]. We found specific edge states in the range of energies that define the fundamental band gap of 2D HgTe monolayer. Moreover, we show that the electronic and transport properties of these states depend strongly on nanoribbon width and type of edge, and we demonstrate how external fields can be employed to control them.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade",
title = "Influence of boundary conditions on electronic and transport properties in monolayer low – buckled HgTe nanoribbons",
pages = "77",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10903"
}

Topalović, D., Arsoski, V. V., Tadić, M. Ž., Radenković, M., Božović, P.,& Peeters, F. M.. (2021). Influence of boundary conditions on electronic and transport properties in monolayer low – buckled HgTe nanoribbons. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
Belgrade : Institute of Physics Belgrade., 77.
https://hdl.handle.net/21.15107/rcub_vinar_10903

Topalović D, Arsoski VV, Tadić MŽ, Radenković M, Božović P, Peeters FM. Influence of boundary conditions on electronic and transport properties in monolayer low – buckled HgTe nanoribbons. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade. 2021;:77.
https://hdl.handle.net/21.15107/rcub_vinar_10903 .

Topalović, Dušan, Arsoski, V. V., Tadić, M. Ž., Radenković, M., Božović, Predrag, Peeters, F. M., "Influence of boundary conditions on electronic and transport properties in monolayer low – buckled HgTe nanoribbons" in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade (2021):77,
https://hdl.handle.net/21.15107/rcub_vinar_10903 .

TY  - CONF
AU  - Topalović, Dušan
AU  - Radenković, Mirjana
AU  - Tasić, Viša
AU  - Stanić, Vojislav
AU  - Božović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11124
AB  - Positive matrix factorization (PMF) is a dimension reduction method used to model the covariance structures of observable variables in order to impel a smaller number of latent nonnegative factors. It resolves receptor modeling problem, which is based on the chemical mass balance equation (CMB) and may discover hidden patterns in the environmental data, where each extracted factor is accompanied by an actual source of emission. In this paper, PMF source apportionment analyses of fine aerosol fraction (PM2.5 mode) at Belgrade suburban background site, in 2016/17 year, have been performed by processing a data set of 130 PM2.5 mass concentrations and twenty-one elemental concentrations and soot concentrations in each PM2.5 sample (mode). The PM2.5 mass concentrations in collected samples have been determined following SRPS EN 12341:201 procedure, elemental concentrations were obtained by PIXE alanytical technique in the frame of the regional IAEA project, in the Institute of Nuclear Research, Hungarian Academy of Sciences, and soot concentrations were analyzed by smoke stain reflectometry in accordance with ISO 9835:1993 (E). The EPA PMF program ver 5.0, was used to solve the PMF model. Since the determination of an optimal PMF solution is a strongly heuristic procedure, there is a necessity of finding a more quantitative ways to reduce the arbitrariness of this technique. In order to reduce the range of possible solutions, we have analyzed how the values of model parameters changes as a function of the number of factors. PMF modeling was performed in a robust mode. For the purpose of finding the best fit solution wich minimize the object function Q, we varied the number of factors in the range from 4 to 8. Additionally, influence of rotations are also analyzed in iterative steps by varying FPEAK function in the range -1 to +1 with an increment of 0.5. Obtained results indicated significant role of Q/Qexp ratio analysis for optimal solution choice. In optimization process, number of factors with Q/Qexp ratio less than 1, were rejected as a possible solutions. This paper shows that optimization procedure should include examination of rotational matrix in which the rotational degree of freedom of solution is considered. Solutions with a steep change in their rotational degree of freedom were rejected. Finally, the additional improvement can be done by optimizing the parameters representing the scaled mean value (IM) and the scaled standard deviation (IS) of the each individual column in scaled residual matrix.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software
SP  - 68
DO  - 10.21175/rad.abstr.book.2021.12.3
ER  - 

@conference{
author = "Topalović, Dušan and Radenković, Mirjana and Tasić, Viša and Stanić, Vojislav and Božović, Predrag",
year = "2021",
abstract = "Positive matrix factorization (PMF) is a dimension reduction method used to model the covariance structures of observable variables in order to impel a smaller number of latent nonnegative factors. It resolves receptor modeling problem, which is based on the chemical mass balance equation (CMB) and may discover hidden patterns in the environmental data, where each extracted factor is accompanied by an actual source of emission. In this paper, PMF source apportionment analyses of fine aerosol fraction (PM2.5 mode) at Belgrade suburban background site, in 2016/17 year, have been performed by processing a data set of 130 PM2.5 mass concentrations and twenty-one elemental concentrations and soot concentrations in each PM2.5 sample (mode). The PM2.5 mass concentrations in collected samples have been determined following SRPS EN 12341:201 procedure, elemental concentrations were obtained by PIXE alanytical technique in the frame of the regional IAEA project, in the Institute of Nuclear Research, Hungarian Academy of Sciences, and soot concentrations were analyzed by smoke stain reflectometry in accordance with ISO 9835:1993 (E). The EPA PMF program ver 5.0, was used to solve the PMF model. Since the determination of an optimal PMF solution is a strongly heuristic procedure, there is a necessity of finding a more quantitative ways to reduce the arbitrariness of this technique. In order to reduce the range of possible solutions, we have analyzed how the values of model parameters changes as a function of the number of factors. PMF modeling was performed in a robust mode. For the purpose of finding the best fit solution wich minimize the object function Q, we varied the number of factors in the range from 4 to 8. Additionally, influence of rotations are also analyzed in iterative steps by varying FPEAK function in the range -1 to +1 with an increment of 0.5. Obtained results indicated significant role of Q/Qexp ratio analysis for optimal solution choice. In optimization process, number of factors with Q/Qexp ratio less than 1, were rejected as a possible solutions. This paper shows that optimization procedure should include examination of rotational matrix in which the rotational degree of freedom of solution is considered. Solutions with a steep change in their rotational degree of freedom were rejected. Finally, the additional improvement can be done by optimizing the parameters representing the scaled mean value (IM) and the scaled standard deviation (IS) of the each individual column in scaled residual matrix.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software",
pages = "68",
doi = "10.21175/rad.abstr.book.2021.12.3"
}

Topalović, D., Radenković, M., Tasić, V., Stanić, V.,& Božović, P.. (2021). Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 68.
https://doi.org/10.21175/rad.abstr.book.2021.12.3

Topalović D, Radenković M, Tasić V, Stanić V, Božović P. Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:68.
doi:10.21175/rad.abstr.book.2021.12.3 .

Topalović, Dušan, Radenković, Mirjana, Tasić, Viša, Stanić, Vojislav, Božović, Predrag, "Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):68,
https://doi.org/10.21175/rad.abstr.book.2021.12.3 . .

TY  - CONF
AU  - Stanković-Petrović, Jelena S.
AU  - Krajinović, Marko
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Kojić, Andrea
AU  - Božović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11129
AB  - The results of the post-irradiation fading of whole body dosemeters based on two TLD-100TM (Thermo Scientific™ Harshaw™, USA) detectors are presented. The dosemeters are regularly used by accredited individual monitoring service (IMS) at Vinca Institute of Nuclear Science (VINS), Belgrade, Serbia. The testing of post-irradiation fading was carried out according to International Electrotechnical Commission (IEC) 62387:2020 standard. The irradiations are done in S-Cs137 field at secondary standard dosimetry laboratory (SSDL) at VINS, according to International Organization for Standardization document ISO 4037-3:2019. The chosen reference personal dose equivalent value was 3 mSv. The research was carried out in the period from October 2020 to February 2021, and it lasted 128 days. The frequency of irradiations was approximately 7 days, while 3 periods between irradiations were longer than 10 days, due to COVID-19 pandemic. The irradiations were performed at different dates; thus, all dose readouts were done on the same day to prevent influence of reader’s instabilities. The irradiated dosemeters were stored at the same room where the average temperature was nearly 20°C. There were 14 groups with 6 dosemeters for irradiation and 2 dosemeters for natural background radiation level correction. The reader was Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA). The whole glow curve was used for dose estimation (all of 200 channels). The time as influence quantity was considered to be of type F, thus the range of relative response was limiting factor in the analysis. The results showed that the maximum measurement time tmax is 72 days for deep dose (Hp(10)) detector, and 85 days for shallow dose (Hp(0.07)) detector. Thus, the standard’s requirement is satisfied, as it is required minimum of 30 days. The relative response range for all of the 14 groups was from 0.82 to 1.14 and from 0.83 to 1.17, for deep and shallow dose, respectively. The research has limitation as the irradiations were organized aligned to COVID-19 working schedule. One of the consequences of this timetable is lack of 7 days’ time point, thus the values from 16 days’ time point was used as referential.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - TLD-100 post-irradiation fading characteristics according to IEC 62387:2020 standard
SP  - 219
DO  - 10.21175/rad.abstr.book.2021.31.12
ER  - 

@conference{
author = "Stanković-Petrović, Jelena S. and Krajinović, Marko and Kržanović, Nikola and Živanović, Miloš and Kojić, Andrea and Božović, Predrag",
year = "2021",
abstract = "The results of the post-irradiation fading of whole body dosemeters based on two TLD-100TM (Thermo Scientific™ Harshaw™, USA) detectors are presented. The dosemeters are regularly used by accredited individual monitoring service (IMS) at Vinca Institute of Nuclear Science (VINS), Belgrade, Serbia. The testing of post-irradiation fading was carried out according to International Electrotechnical Commission (IEC) 62387:2020 standard. The irradiations are done in S-Cs137 field at secondary standard dosimetry laboratory (SSDL) at VINS, according to International Organization for Standardization document ISO 4037-3:2019. The chosen reference personal dose equivalent value was 3 mSv. The research was carried out in the period from October 2020 to February 2021, and it lasted 128 days. The frequency of irradiations was approximately 7 days, while 3 periods between irradiations were longer than 10 days, due to COVID-19 pandemic. The irradiations were performed at different dates; thus, all dose readouts were done on the same day to prevent influence of reader’s instabilities. The irradiated dosemeters were stored at the same room where the average temperature was nearly 20°C. There were 14 groups with 6 dosemeters for irradiation and 2 dosemeters for natural background radiation level correction. The reader was Harshaw TLD™ Model 6600 Plus Automated Reader (Thermo Fisher Scientific, USA). The whole glow curve was used for dose estimation (all of 200 channels). The time as influence quantity was considered to be of type F, thus the range of relative response was limiting factor in the analysis. The results showed that the maximum measurement time tmax is 72 days for deep dose (Hp(10)) detector, and 85 days for shallow dose (Hp(0.07)) detector. Thus, the standard’s requirement is satisfied, as it is required minimum of 30 days. The relative response range for all of the 14 groups was from 0.82 to 1.14 and from 0.83 to 1.17, for deep and shallow dose, respectively. The research has limitation as the irradiations were organized aligned to COVID-19 working schedule. One of the consequences of this timetable is lack of 7 days’ time point, thus the values from 16 days’ time point was used as referential.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "TLD-100 post-irradiation fading characteristics according to IEC 62387:2020 standard",
pages = "219",
doi = "10.21175/rad.abstr.book.2021.31.12"
}

Stanković-Petrović, J. S., Krajinović, M., Kržanović, N., Živanović, M., Kojić, A.,& Božović, P.. (2021). TLD-100 post-irradiation fading characteristics according to IEC 62387:2020 standard. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 219.
https://doi.org/10.21175/rad.abstr.book.2021.31.12

Stanković-Petrović JS, Krajinović M, Kržanović N, Živanović M, Kojić A, Božović P. TLD-100 post-irradiation fading characteristics according to IEC 62387:2020 standard. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:219.
doi:10.21175/rad.abstr.book.2021.31.12 .

Stanković-Petrović, Jelena S., Krajinović, Marko, Kržanović, Nikola, Živanović, Miloš, Kojić, Andrea, Božović, Predrag, "TLD-100 post-irradiation fading characteristics according to IEC 62387:2020 standard" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):219,
https://doi.org/10.21175/rad.abstr.book.2021.31.12 . .

TY  - JOUR
AU  - Dimović, Slavko
AU  - Jelić, Ivana
AU  - Stanić, Vojislav
AU  - Kojić, Andrea
AU  - Božović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12884
AB  - The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-empirical models were used. Due to the presence of spent ion exchange resin, the cement matrix absorbed a larger amount of water, swelled, and degraded. This phenomenon caused a significantly lower value of mechanical resistance to pressure. Also, through the increase of bentonite and zeolite content, the cement matrix decreased its mechanical resistance. The retention of cesium ions in the cement matrix was low and they were leached during the early phase of the investigation. The diffusion coefficient, De, decreased by three orders of magnitude with the addition of zeolite and bentonite in the cement matrix. Linear regression of experimental Cs+ leaching results, under static conditions, displayed that the semi-empirical parameter K3 than the absolute values of the parameters K2 and K1. Therefore, the contribution of matrix dissolution to the total radionuclides transport was irrelevant to the prevailing share of diffusion and surface washing processes.
T2  - Nuclear Technology and Radiation Protection
T1  - Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin
T1  - Matematičko  modelovanje  fenomena  transporta  Cs+  iz solidifikovane  istrošene  jonoizmenjivačke  smole
VL  - 36
IS  - 2
SP  - 163
EP  - 167
DO  - 10.2298/NTRP210128016D
ER  - 

@article{
author = "Dimović, Slavko and Jelić, Ivana and Stanić, Vojislav and Kojić, Andrea and Božović, Predrag",
year = "2021",
abstract = "The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-empirical models were used. Due to the presence of spent ion exchange resin, the cement matrix absorbed a larger amount of water, swelled, and degraded. This phenomenon caused a significantly lower value of mechanical resistance to pressure. Also, through the increase of bentonite and zeolite content, the cement matrix decreased its mechanical resistance. The retention of cesium ions in the cement matrix was low and they were leached during the early phase of the investigation. The diffusion coefficient, De, decreased by three orders of magnitude with the addition of zeolite and bentonite in the cement matrix. Linear regression of experimental Cs+ leaching results, under static conditions, displayed that the semi-empirical parameter K3 than the absolute values of the parameters K2 and K1. Therefore, the contribution of matrix dissolution to the total radionuclides transport was irrelevant to the prevailing share of diffusion and surface washing processes.",
journal = "Nuclear Technology and Radiation Protection",
title = "Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin, Matematičko  modelovanje  fenomena  transporta  Cs+  iz solidifikovane  istrošene  jonoizmenjivačke  smole",
volume = "36",
number = "2",
pages = "163-167",
doi = "10.2298/NTRP210128016D"
}

Dimović, S., Jelić, I., Stanić, V., Kojić, A.,& Božović, P.. (2021). Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin. in Nuclear Technology and Radiation Protection, 36(2), 163-167.
https://doi.org/10.2298/NTRP210128016D

Dimović S, Jelić I, Stanić V, Kojić A, Božović P. Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin. in Nuclear Technology and Radiation Protection. 2021;36(2):163-167.
doi:10.2298/NTRP210128016D .

Dimović, Slavko, Jelić, Ivana, Stanić, Vojislav, Kojić, Andrea, Božović, Predrag, "Mathematical modeling of Cs+ transport phenomena from solidified spent ion exchange resin" in Nuclear Technology and Radiation Protection, 36, no. 2 (2021):163-167,
https://doi.org/10.2298/NTRP210128016D . .

TY  - JOUR
AU  - Rafajlović, Stefan
AU  - Ciraj-Bjelac, Olivera
AU  - Božović, Predrag
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9182
AB  - The objective of this work is to investigate the possibility to set a national diagnostic reference levels (nDRLs) for diagnostic and screening mammography in Serbia based on local practice and available resources. This study included all types of mammography systems that are currently used in Serbia, namely screen-film mammography (SFM), computed radiography (CR) and full-field digital mammography (FFDM). The nDRLs are provided in terms of mean glandular dose (MGD) for different breast thicknesses simulated by polymethyl methacrylate (PMMA) phantom. For each breast thickness, MGD was calculated for the X-ray tube output, using clinically used exposure parameters. DRLs were chosen as the 75th percentile of MGD distribution for 20-, 40-, 45-, 60- and 70-mm phantom thicknesses. For SFM units proposed nDRL values are 0.7, 2.1, 2.7, 4.6 and 6.8 mGy; for CR units proposed nDRL values are 0.7, 1.8, 2.4, 4.5 and 5.6 mGy; and corresponding values for FFDM units are 0.8, 1.7, 2, 2. and 3.2 mGy for 20-, 40-, 45-, 60- and 70-mm PMMA thickness, respectively.
T2  - Radiation Protection Dosimetry
T1  - Towards national diagnostic reference levels for mammography in Serbia
VL  - 191
IS  - 4
SP  - 477
EP  - 486
DO  - 10.1093/rpd/ncaa173
ER  - 

@article{
author = "Rafajlović, Stefan and Ciraj-Bjelac, Olivera and Božović, Predrag",
year = "2020",
abstract = "The objective of this work is to investigate the possibility to set a national diagnostic reference levels (nDRLs) for diagnostic and screening mammography in Serbia based on local practice and available resources. This study included all types of mammography systems that are currently used in Serbia, namely screen-film mammography (SFM), computed radiography (CR) and full-field digital mammography (FFDM). The nDRLs are provided in terms of mean glandular dose (MGD) for different breast thicknesses simulated by polymethyl methacrylate (PMMA) phantom. For each breast thickness, MGD was calculated for the X-ray tube output, using clinically used exposure parameters. DRLs were chosen as the 75th percentile of MGD distribution for 20-, 40-, 45-, 60- and 70-mm phantom thicknesses. For SFM units proposed nDRL values are 0.7, 2.1, 2.7, 4.6 and 6.8 mGy; for CR units proposed nDRL values are 0.7, 1.8, 2.4, 4.5 and 5.6 mGy; and corresponding values for FFDM units are 0.8, 1.7, 2, 2. and 3.2 mGy for 20-, 40-, 45-, 60- and 70-mm PMMA thickness, respectively.",
journal = "Radiation Protection Dosimetry",
title = "Towards national diagnostic reference levels for mammography in Serbia",
volume = "191",
number = "4",
pages = "477-486",
doi = "10.1093/rpd/ncaa173"
}

Rafajlović, S., Ciraj-Bjelac, O.,& Božović, P.. (2020). Towards national diagnostic reference levels for mammography in Serbia. in Radiation Protection Dosimetry, 191(4), 477-486.
https://doi.org/10.1093/rpd/ncaa173

Rafajlović S, Ciraj-Bjelac O, Božović P. Towards national diagnostic reference levels for mammography in Serbia. in Radiation Protection Dosimetry. 2020;191(4):477-486.
doi:10.1093/rpd/ncaa173 .

Rafajlović, Stefan, Ciraj-Bjelac, Olivera, Božović, Predrag, "Towards national diagnostic reference levels for mammography in Serbia" in Radiation Protection Dosimetry, 191, no. 4 (2020):477-486,
https://doi.org/10.1093/rpd/ncaa173 . .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Živanović, Miloš
AU  - Ciraj-Bjelac, Olivera
AU  - Božović, Predrag
AU  - Kojić, Andrea
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11904
AB  - Quality assurance in the area of diagnostic radiology is performed by examining X-ray output parameters under medical exposure irradiation conditions using calibrated dosimetry equipment. The diagnostic radiology dosimeters are calibrated in reference radiation fields established according to IEC 61267 international standard. In practice, radiation qualities are defined by the X-ray tube voltage and the half-value layer and homogeneity coefficient. Comparison of these parameters with the recommendations of the standard can be used for incident photon spectrum characterization and modification by improving the added filtration for each radiation quality, thus acquiring the desired half-value layer for the given X-ray tube voltage. For most of the diagnostic radiology radiation qualities available at the Secondary Standard Dosimetry Laboratory a deviation of the first half-value layer less than ±3% was achieved, with an exception of one radiation quality where a correction would be required.
PB  - Belgrade : ETRAN Society
PB  - Belgrade : Academic Mind
C3  - IcETRAN 2020 : 7th International Conference on Electrical, Electronic and Computing Engineering and ETRAN 2020 : 64th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering; Proceedings book
T1  - Establishing the RQR radiation qualities in the Secondary Standard Dosimetry Laboratory
SP  - 541
EP  - 544
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11904
ER  - 

@conference{
author = "Kržanović, Nikola and Živanović, Miloš and Ciraj-Bjelac, Olivera and Božović, Predrag and Kojić, Andrea",
year = "2020",
abstract = "Quality assurance in the area of diagnostic radiology is performed by examining X-ray output parameters under medical exposure irradiation conditions using calibrated dosimetry equipment. The diagnostic radiology dosimeters are calibrated in reference radiation fields established according to IEC 61267 international standard. In practice, radiation qualities are defined by the X-ray tube voltage and the half-value layer and homogeneity coefficient. Comparison of these parameters with the recommendations of the standard can be used for incident photon spectrum characterization and modification by improving the added filtration for each radiation quality, thus acquiring the desired half-value layer for the given X-ray tube voltage. For most of the diagnostic radiology radiation qualities available at the Secondary Standard Dosimetry Laboratory a deviation of the first half-value layer less than ±3% was achieved, with an exception of one radiation quality where a correction would be required.",
publisher = "Belgrade : ETRAN Society, Belgrade : Academic Mind",
journal = "IcETRAN 2020 : 7th International Conference on Electrical, Electronic and Computing Engineering and ETRAN 2020 : 64th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering; Proceedings book",
title = "Establishing the RQR radiation qualities in the Secondary Standard Dosimetry Laboratory",
pages = "541-544",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11904"
}

Kržanović, N., Živanović, M., Ciraj-Bjelac, O., Božović, P.,& Kojić, A.. (2020). Establishing the RQR radiation qualities in the Secondary Standard Dosimetry Laboratory. in IcETRAN 2020 : 7th International Conference on Electrical, Electronic and Computing Engineering and ETRAN 2020 : 64th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering; Proceedings book
Belgrade : ETRAN Society., 541-544.
https://hdl.handle.net/21.15107/rcub_vinar_11904

Kržanović N, Živanović M, Ciraj-Bjelac O, Božović P, Kojić A. Establishing the RQR radiation qualities in the Secondary Standard Dosimetry Laboratory. in IcETRAN 2020 : 7th International Conference on Electrical, Electronic and Computing Engineering and ETRAN 2020 : 64th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering; Proceedings book. 2020;:541-544.
https://hdl.handle.net/21.15107/rcub_vinar_11904 .

Kržanović, Nikola, Živanović, Miloš, Ciraj-Bjelac, Olivera, Božović, Predrag, Kojić, Andrea, "Establishing the RQR radiation qualities in the Secondary Standard Dosimetry Laboratory" in IcETRAN 2020 : 7th International Conference on Electrical, Electronic and Computing Engineering and ETRAN 2020 : 64th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering; Proceedings book (2020):541-544,
https://hdl.handle.net/21.15107/rcub_vinar_11904 .

TY  - CONF
AU  - Kržanović, Nikola
AU  - Živanović, Miloš Z.
AU  - Božović, Predrag
AU  - Stanković, Srboljub
PY  - 2019
UR  - https://plus.sr.cobiss.net/opac7/bib/279687436
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8715
AB  - Kontrola kvaliteta u radioterapiji je od velike vaţnosti za poboljšanje preciznosti i pouzdanosti radioterapijskih procedura. Minimizacija negativnih posledica po pacijente se postiţe smanjenjem verovatnoće pojavljivanja slučajnih i sistematskih grešaka identifikovanjem problema u postojećim standardnim procedurama u bolnicama. Značajna metoda kontrole kvaliteta rada radioterapijskih centara jeste program poštanske termoluminiscentne dozimetrije, zajednički organizovan od strane Međunarodne agencije za atomsku energiju i Svetske zdravstvene organizacije, a u kojem učestvuje oko 1700 bolnica širom sveta. Radioterapijski centri u Srbiji takođe učestvuju u ovom programu. Program poređenja apsorbovanih doza u vodi u radioterapijskim centrima u Srbiji je sproveden i tokom 2017, 2018. i 2019. godine. U tom periodu, broj obuhvaćenih centara je porastao sa šest na osam. Radiofotoluminiscentni dozimetri su ozračivani u visokoenergetskim poljima X-fotona generisanim pomoću linearnih akceleratora.
AB  - Quality control in radiotherapy is of great importance in order to improve accuracy and reliability of radiotherapy procedures in hospitals. Minimization of the possible negative consequences of these procedures is achieved by reducing the probability of any random or systematic errors appearing, by determining the existing problems in the standard hospital procedures. One of the important methods for the radiotherapy facilities quality control is the postal thermoluminiscent dosimetry programme, co-organized by International Atomic Energy Agency and the World Health Organization, in which approximately 1700 hospitals throughout the world are participating. Radiotherapy centers in Serbia also participate in this programme, which has been executed during 2017, 2018 and 2019. During this period the number of participating radiotherapy centers in Serbia has increased from six to eight. Radiophotoluminiscent dosimeters have been irradiated in the high-energy X-ray fields generated by using linear accelerators.
PB  - Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе
C3  - 30. симпозијум ДЗЗСЦГ : зборник радова
T1  - Provera apsorbovanih doza u vodi u radioterapijskim ustanovama Srbije od 2017. do 2019. godine
T1  - Dosimetry audit in radiotherapy centers in Serbia in period from 2017 to 2019
SP  - 447
EP  - 452
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8715
ER  - 

@conference{
author = "Kržanović, Nikola and Živanović, Miloš Z. and Božović, Predrag and Stanković, Srboljub",
year = "2019",
abstract = "Kontrola kvaliteta u radioterapiji je od velike vaţnosti za poboljšanje preciznosti i pouzdanosti radioterapijskih procedura. Minimizacija negativnih posledica po pacijente se postiţe smanjenjem verovatnoće pojavljivanja slučajnih i sistematskih grešaka identifikovanjem problema u postojećim standardnim procedurama u bolnicama. Značajna metoda kontrole kvaliteta rada radioterapijskih centara jeste program poštanske termoluminiscentne dozimetrije, zajednički organizovan od strane Međunarodne agencije za atomsku energiju i Svetske zdravstvene organizacije, a u kojem učestvuje oko 1700 bolnica širom sveta. Radioterapijski centri u Srbiji takođe učestvuju u ovom programu. Program poređenja apsorbovanih doza u vodi u radioterapijskim centrima u Srbiji je sproveden i tokom 2017, 2018. i 2019. godine. U tom periodu, broj obuhvaćenih centara je porastao sa šest na osam. Radiofotoluminiscentni dozimetri su ozračivani u visokoenergetskim poljima X-fotona generisanim pomoću linearnih akceleratora., Quality control in radiotherapy is of great importance in order to improve accuracy and reliability of radiotherapy procedures in hospitals. Minimization of the possible negative consequences of these procedures is achieved by reducing the probability of any random or systematic errors appearing, by determining the existing problems in the standard hospital procedures. One of the important methods for the radiotherapy facilities quality control is the postal thermoluminiscent dosimetry programme, co-organized by International Atomic Energy Agency and the World Health Organization, in which approximately 1700 hospitals throughout the world are participating. Radiotherapy centers in Serbia also participate in this programme, which has been executed during 2017, 2018 and 2019. During this period the number of participating radiotherapy centers in Serbia has increased from six to eight. Radiophotoluminiscent dosimeters have been irradiated in the high-energy X-ray fields generated by using linear accelerators.",
publisher = "Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе",
journal = "30. симпозијум ДЗЗСЦГ : зборник радова",
title = "Provera apsorbovanih doza u vodi u radioterapijskim ustanovama Srbije od 2017. do 2019. godine, Dosimetry audit in radiotherapy centers in Serbia in period from 2017 to 2019",
pages = "447-452",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8715"
}

Kržanović, N., Živanović, M. Z., Božović, P.,& Stanković, S.. (2019). Provera apsorbovanih doza u vodi u radioterapijskim ustanovama Srbije od 2017. do 2019. godine. in 30. симпозијум ДЗЗСЦГ : зборник радова
Београд : Институт за нуклеарне науке "Винча" : Друштво за заштиту од зрачења Србије и Црне Горе., 447-452.
https://hdl.handle.net/21.15107/rcub_vinar_8715

Kržanović N, Živanović MZ, Božović P, Stanković S. Provera apsorbovanih doza u vodi u radioterapijskim ustanovama Srbije od 2017. do 2019. godine. in 30. симпозијум ДЗЗСЦГ : зборник радова. 2019;:447-452.
https://hdl.handle.net/21.15107/rcub_vinar_8715 .

Kržanović, Nikola, Živanović, Miloš Z., Božović, Predrag, Stanković, Srboljub, "Provera apsorbovanih doza u vodi u radioterapijskim ustanovama Srbije od 2017. do 2019. godine" in 30. симпозијум ДЗЗСЦГ : зборник радова (2019):447-452,
https://hdl.handle.net/21.15107/rcub_vinar_8715 .

TY  - JOUR
AU  - Božović, Predrag
AU  - Ciraj-Bjelac, Olivera
AU  - Stanković-Petrović, Jelena S.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8786
AB  - Medical personnel performing interventional procedures in cardiology and radiology is considered to be a professional group exposed to high doses of ionizing radiation. Reduction of the eye lens dose limit made its assessment in the interventional procedures one of the most challenging topics. The objective of this work is to assess eye lens doses based on the whole-body doses using methods of computational dosimetry. Assessment included different C-arm orientations (PA, LAO and RAO), tube voltages (80 –110 kV) and efficiency of different combinations of protective equipment used in interventional procedures. Center position at the height of the thyroid gives best estimate of eye lens dose, with spreads of 11% (13%), 13% (17%) and 14% (13%) for the left (right) eye lens. The conversion factors of 1.03 (0.83), 1.28 (1.06) and 1.36 (1.06) to convert whole body to eye lens dose were derived for positions of first operator, nurse and radiographer, respectively. The eye lens dose reduction factors for different combinations of applied protective equipment are 178, 5 and 6, respectively.
T2  - Radiation Protection Dosimetry
T1  - Occupational Eye Lens Dose Estimated Using Whole-Body Dosemeter In Interventional Cardiology And Radiology: A Monte Carlo Study
VL  - 185
IS  - 2
SP  - 135
EP  - 142
DO  - 10.1093/rpd/ncy283
ER  - 

@article{
author = "Božović, Predrag and Ciraj-Bjelac, Olivera and Stanković-Petrović, Jelena S.",
year = "2019",
abstract = "Medical personnel performing interventional procedures in cardiology and radiology is considered to be a professional group exposed to high doses of ionizing radiation. Reduction of the eye lens dose limit made its assessment in the interventional procedures one of the most challenging topics. The objective of this work is to assess eye lens doses based on the whole-body doses using methods of computational dosimetry. Assessment included different C-arm orientations (PA, LAO and RAO), tube voltages (80 –110 kV) and efficiency of different combinations of protective equipment used in interventional procedures. Center position at the height of the thyroid gives best estimate of eye lens dose, with spreads of 11% (13%), 13% (17%) and 14% (13%) for the left (right) eye lens. The conversion factors of 1.03 (0.83), 1.28 (1.06) and 1.36 (1.06) to convert whole body to eye lens dose were derived for positions of first operator, nurse and radiographer, respectively. The eye lens dose reduction factors for different combinations of applied protective equipment are 178, 5 and 6, respectively.",
journal = "Radiation Protection Dosimetry",
title = "Occupational Eye Lens Dose Estimated Using Whole-Body Dosemeter In Interventional Cardiology And Radiology: A Monte Carlo Study",
volume = "185",
number = "2",
pages = "135-142",
doi = "10.1093/rpd/ncy283"
}

Božović, P., Ciraj-Bjelac, O.,& Stanković-Petrović, J. S.. (2019). Occupational Eye Lens Dose Estimated Using Whole-Body Dosemeter In Interventional Cardiology And Radiology: A Monte Carlo Study. in Radiation Protection Dosimetry, 185(2), 135-142.
https://doi.org/10.1093/rpd/ncy283

Božović P, Ciraj-Bjelac O, Stanković-Petrović JS. Occupational Eye Lens Dose Estimated Using Whole-Body Dosemeter In Interventional Cardiology And Radiology: A Monte Carlo Study. in Radiation Protection Dosimetry. 2019;185(2):135-142.
doi:10.1093/rpd/ncy283 .

Božović, Predrag, Ciraj-Bjelac, Olivera, Stanković-Petrović, Jelena S., "Occupational Eye Lens Dose Estimated Using Whole-Body Dosemeter In Interventional Cardiology And Radiology: A Monte Carlo Study" in Radiation Protection Dosimetry, 185, no. 2 (2019):135-142,
https://doi.org/10.1093/rpd/ncy283 . .