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  - Živanović, Miloš
AU  - Komatina, Ivana
AU  - Kržanović, Nikola
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11912
AB  - Quality Control (QC) measurements in diagnostic radiology are performed on a wide range of X-ray machines, used for different modalities such as radiography, fluoroscopy, mammography etc. Diagnostic radiology multimeters are in wide use in QC measurements [IAEA TRS 457, IAEA, 2007]. Many of these devices are based on several solid-state detectors positioned behind different filters, and values of different quantities can be calculated based on the signal from these detectors. Besides air kerma and X-ray tube high voltage, multimeters can often measure other special quantities, such as Half Value Layer (HVL), total filtration, irradiation time, product of current and time etc. Calibrations for these special quantities are very rarely available in Secondary Standards Dosimetry Laboratories (SSDL) or other calibration laboratories, so many end-users have problems to establish traceability. Research is currently being undertaken in Vinca Institute SSDL with the aim to establish traceability for HVL calibrations. HVL is a quantity that is commonly measured in SSDLs during internal QA/QC procedures, but there is no consensus on how to establish the traceability in SSDLs. Furthermore, measurement uncertainty for HVL is rarely estimated. In this research, HVL measurement procedure will be updated and detailed evaluation of measurement uncertainty will be undertaken. Sources of uncertainty that will be considered are: energy dependence of ionization chamber, thickness of aluminum filters, statistics of current measurements (reference chamber and monitor chamber), temperature, pressure etc. Traceable results of HVL measurements will further be used to calibrate and test multimeters in reference fields. In this paper, first results are presented.
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  - Traceability of Solid State Detectors used for Half Value Layer measurements in diagnostic radiology
SP  - 29
EP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11912
ER  - 

@conference{
author = "Živanović, Miloš and Komatina, Ivana and Kržanović, Nikola",
year = "2023",
abstract = "Quality Control (QC) measurements in diagnostic radiology are performed on a wide range of X-ray machines, used for different modalities such as radiography, fluoroscopy, mammography etc. Diagnostic radiology multimeters are in wide use in QC measurements [IAEA TRS 457, IAEA, 2007]. Many of these devices are based on several solid-state detectors positioned behind different filters, and values of different quantities can be calculated based on the signal from these detectors. Besides air kerma and X-ray tube high voltage, multimeters can often measure other special quantities, such as Half Value Layer (HVL), total filtration, irradiation time, product of current and time etc. Calibrations for these special quantities are very rarely available in Secondary Standards Dosimetry Laboratories (SSDL) or other calibration laboratories, so many end-users have problems to establish traceability. Research is currently being undertaken in Vinca Institute SSDL with the aim to establish traceability for HVL calibrations. HVL is a quantity that is commonly measured in SSDLs during internal QA/QC procedures, but there is no consensus on how to establish the traceability in SSDLs. Furthermore, measurement uncertainty for HVL is rarely estimated. In this research, HVL measurement procedure will be updated and detailed evaluation of measurement uncertainty will be undertaken. Sources of uncertainty that will be considered are: energy dependence of ionization chamber, thickness of aluminum filters, statistics of current measurements (reference chamber and monitor chamber), temperature, pressure etc. Traceable results of HVL measurements will further be used to calibrate and test multimeters in reference fields. In this paper, first results are presented.",
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 = "Traceability of Solid State Detectors used for Half Value Layer measurements in diagnostic radiology",
pages = "29-29",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11912"
}

Živanović, M., Komatina, I.,& Kržanović, N.. (2023). Traceability of Solid State Detectors used for Half Value Layer measurements in diagnostic radiology. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts
Niš : Sievert Association., 29-29.
https://hdl.handle.net/21.15107/rcub_vinar_11912

Živanović M, Komatina I, Kržanović N. Traceability of Solid State Detectors used for Half Value Layer measurements in diagnostic radiology. in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts. 2023;:29-29.
https://hdl.handle.net/21.15107/rcub_vinar_11912 .

Živanović, Miloš, Komatina, Ivana, Kržanović, Nikola, "Traceability of Solid State Detectors used for Half Value Layer measurements in diagnostic radiology" in RAP 2023 : International conference on radiation applications in Physics, Chemistry, Biology, Medical Sciences, Engineering and Environmental Sciences; Book of abstracts (2023):29-29,
https://hdl.handle.net/21.15107/rcub_vinar_11912 .