TY  - JOUR
AU  - Milatovic, Aleksandra
AU  - Ciraj-Bjelac, Olivera
AU  - Ivanović, Sonja
AU  - Jovanovic, Slobodan
AU  - Spasić-Jokić, Vesna
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4853
AB  - It was the aim of the study presented here to estimate for the first time patient dose levels in conventional diagnostic radiology in Montenegro. Measurements of patient dose in terms of entrance surface air kerma (ESAK) and kerma-area product (KAP) were performed on at least 10 patients for each examination type, in each of five randomly selected health institutions in Montenegro, so that a total of 872 patients for 16 different examination categories were included in the survey (817 patients for 1049 radiographies and 55 fluoroscopy patients). Exposure settings and individual data were recorded for each patient. Mean, median and third quartile values ESAK of patient doses are reported. The estimated mean ESAK values obtained are as follows: 4.7 mGy for pelvis anteroposterior (AP), 4.5 mGy for lumbar spine AP, 7.8 mGy for lumbar spine lateral (LAT), 3.1 mGy for thoracic spine AP and 4.3 mGy for thoracic spine LAT. When compared with the European diagnostic reference values, the mean ESAK for all studied examination types are found to be below the reference levels, except in chest radiography. Mean ESAK values for chest radiography are 0.9 mGy for posteroanterior (PA) projection and 2.0 mGy for LAT. The results exhibit a wide range of variation. For fluoroscopy examinations, the total KAP was measured. The mean KAP value per procedure for barium meal is found to be 22 Gy cm(2), 41 Gy cm(2) for barium enema and 19 Gy cm(2) for intravenous urography. Broad dose ranges for the same types of examinations indicate the necessity of applying practice optimisation in diagnostic radiology and establishment of national diagnostic reference levels.
T2  - Radiation Protection Dosimetry
T1  - Patient dose measurements in diagnostic radiology procedures in Montenegro
VL  - 149
IS  - 4
SP  - 454
EP  - 463
DO  - 10.1093/rpd/ncr317
ER  - 

@article{
author = "Milatovic, Aleksandra and Ciraj-Bjelac, Olivera and Ivanović, Sonja and Jovanovic, Slobodan and Spasić-Jokić, Vesna",
year = "2012",
abstract = "It was the aim of the study presented here to estimate for the first time patient dose levels in conventional diagnostic radiology in Montenegro. Measurements of patient dose in terms of entrance surface air kerma (ESAK) and kerma-area product (KAP) were performed on at least 10 patients for each examination type, in each of five randomly selected health institutions in Montenegro, so that a total of 872 patients for 16 different examination categories were included in the survey (817 patients for 1049 radiographies and 55 fluoroscopy patients). Exposure settings and individual data were recorded for each patient. Mean, median and third quartile values ESAK of patient doses are reported. The estimated mean ESAK values obtained are as follows: 4.7 mGy for pelvis anteroposterior (AP), 4.5 mGy for lumbar spine AP, 7.8 mGy for lumbar spine lateral (LAT), 3.1 mGy for thoracic spine AP and 4.3 mGy for thoracic spine LAT. When compared with the European diagnostic reference values, the mean ESAK for all studied examination types are found to be below the reference levels, except in chest radiography. Mean ESAK values for chest radiography are 0.9 mGy for posteroanterior (PA) projection and 2.0 mGy for LAT. The results exhibit a wide range of variation. For fluoroscopy examinations, the total KAP was measured. The mean KAP value per procedure for barium meal is found to be 22 Gy cm(2), 41 Gy cm(2) for barium enema and 19 Gy cm(2) for intravenous urography. Broad dose ranges for the same types of examinations indicate the necessity of applying practice optimisation in diagnostic radiology and establishment of national diagnostic reference levels.",
journal = "Radiation Protection Dosimetry",
title = "Patient dose measurements in diagnostic radiology procedures in Montenegro",
volume = "149",
number = "4",
pages = "454-463",
doi = "10.1093/rpd/ncr317"
}

Milatovic, A., Ciraj-Bjelac, O., Ivanović, S., Jovanovic, S.,& Spasić-Jokić, V.. (2012). Patient dose measurements in diagnostic radiology procedures in Montenegro. in Radiation Protection Dosimetry, 149(4), 454-463.
https://doi.org/10.1093/rpd/ncr317

Milatovic A, Ciraj-Bjelac O, Ivanović S, Jovanovic S, Spasić-Jokić V. Patient dose measurements in diagnostic radiology procedures in Montenegro. in Radiation Protection Dosimetry. 2012;149(4):454-463.
doi:10.1093/rpd/ncr317 .

Milatovic, Aleksandra, Ciraj-Bjelac, Olivera, Ivanović, Sonja, Jovanovic, Slobodan, Spasić-Jokić, Vesna, "Patient dose measurements in diagnostic radiology procedures in Montenegro" in Radiation Protection Dosimetry, 149, no. 4 (2012):454-463,
https://doi.org/10.1093/rpd/ncr317 . .

TY  - JOUR
AU  - Spasić-Jokić, Vesna
AU  - Dobrosavljević, Aleksandar S.
AU  - Beličev, Petar
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5070
AB  - Successful radiotherapy treatment depends on the absorbed dose evaluation and the possibility to define metrological characteristics of the therapy beam. Radiotherapy requires tumor dose delivery with expanded uncertainty less than +/- 5 %. It is particularly important to reduce uncertainty during therapy beam calibration as well as to apply all necessary ionization chamber correction factors. Absorbed dose to water was determined using ionometric method. Calibration was performed in reference cobalt beam. Combined standard uncertainty of the calculated absorbed dose to water in 65 MeV proton beam was +/- 1.97% while the obtained expanded uncertainty of absorbed dose for the same beam quality was +/- 5.02%. The uncertainty estimation method has been developed within the project TESLA.
T2  - Nuclear technology and radiation protection
T1  - Absorbed Dose Uncertainty Estimation for Proton Therapy
VL  - 27
IS  - 3
SP  - 297
EP  - 304
DO  - 10.2298/NTRP1203297S
ER  - 

@article{
author = "Spasić-Jokić, Vesna and Dobrosavljević, Aleksandar S. and Beličev, Petar",
year = "2012",
abstract = "Successful radiotherapy treatment depends on the absorbed dose evaluation and the possibility to define metrological characteristics of the therapy beam. Radiotherapy requires tumor dose delivery with expanded uncertainty less than +/- 5 %. It is particularly important to reduce uncertainty during therapy beam calibration as well as to apply all necessary ionization chamber correction factors. Absorbed dose to water was determined using ionometric method. Calibration was performed in reference cobalt beam. Combined standard uncertainty of the calculated absorbed dose to water in 65 MeV proton beam was +/- 1.97% while the obtained expanded uncertainty of absorbed dose for the same beam quality was +/- 5.02%. The uncertainty estimation method has been developed within the project TESLA.",
journal = "Nuclear technology and radiation protection",
title = "Absorbed Dose Uncertainty Estimation for Proton Therapy",
volume = "27",
number = "3",
pages = "297-304",
doi = "10.2298/NTRP1203297S"
}

Spasić-Jokić, V., Dobrosavljević, A. S.,& Beličev, P.. (2012). Absorbed Dose Uncertainty Estimation for Proton Therapy. in Nuclear technology and radiation protection, 27(3), 297-304.
https://doi.org/10.2298/NTRP1203297S

Spasić-Jokić V, Dobrosavljević AS, Beličev P. Absorbed Dose Uncertainty Estimation for Proton Therapy. in Nuclear technology and radiation protection. 2012;27(3):297-304.
doi:10.2298/NTRP1203297S .

Spasić-Jokić, Vesna, Dobrosavljević, Aleksandar S., Beličev, Petar, "Absorbed Dose Uncertainty Estimation for Proton Therapy" in Nuclear technology and radiation protection, 27, no. 3 (2012):297-304,
https://doi.org/10.2298/NTRP1203297S . .

TY  - JOUR
AU  - Popovic, Dragana
AU  - Bozic, Tatjana
AU  - Stevanović, Jelka
AU  - Frontasyeva, Marina
AU  - Todorović, Dragana
AU  - Ajtić, Jelena V.
AU  - Spasić-Jokić, Vesna
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3945
AB  - Background, aim and scope The paper presents concentrations of trace elements in blood of homebred animals (cows and sheep) from Southern Serbia (Bujanovac) and the contents of natural and anthropogenic radionuclides and some heavy metals in feed. The region of Southern Serbia was exposed to contamination by depleted uranium ammunition during NATO attacks in 1999 and therefore, is of great concern to environmental pollution and human and animal health. Materials and methods Conventional instrumental and epithermal neutron activation analyses are used to measure trace elements in cow and sheep blood samples collected randomly at six locations in the region of Bujanovac (village of Borovac) in the spring of 2005. Samples of feed (grass and crops: corn, wheat and oats), collected on the same locations (households), are analysed for the contents of radionuclides on an HPGe detector (Ortec, relative efficiency 23%) by standard gamma spectrometry. The content of Hg, Pb and Cd in feed is determined by standard atomic absorption spectrometry on the VarianSpectra220/ThermoSolar GFS97 spectrometer. Results Concentrations of 29 elements (Na, Al (P), Cl, K, Sc, Cr, Mn, Ni, Fe, Co, Zn, Se, As, Br, Sr, Rb, Sb, In, I, Ba, Cs, La, Nd, Eu, Sm, Tb, Hf, Ta and Th) are determined in blood of the examined animals. In feeds, natural 40K is found in all of the samples, cosmogenic Be-7 and fission product Cs-137 are detected only in the grass samples, while heavy metals Hg, Cd and Pb are found in the range of 0.01-0.02, 0.84-1.15 and 0.74-7.34 mg/kg, respectively. Calculated soil-to-blood transfer factors are in a wide range of 8.10(-6) to 64, as a result of varying significance of the elements in animal metabolism and feeding habits. Discussion The results of trace elements concentrations in animal blood are in good agreement with available data for K, Ni, Zn, Se and Rb. Higher Br concentrations in animal blood are most probably caused by large biomass burning events during blood sampling. Very low concentration of Fe in cows and sheep confirms the results of previous biochemical studies on animal anaemia in the region. High concentration of As correlates with geochemical peculiarities of the Balkans and is also likely influenced by the use of pesticides in the agricultural production. For some of the elements (La, Nd, Eu, Sm, Tb, Sb, Hf, Ta, Th, In, Ba, Sr, Sc and Cs), there are few or no literature data. Therefore, some of the presented data are significant not only for the country and the region, but on a wider scale. Activities of natural radionuclides in feeds are within the average values reported for the region, while the activities of Pb-210 and U-235/238 are below the limit of detection. This is in accordance with previous investigations showing no widespread contamination by depleted uranium in the area. Contents of Hg and Pb in feeds are below the nationally permissible levels, unlike the content of Cd which exceeds it, probably caused by the use of phosphate fertilisers and fossil fuel combustion in the area. Conclusions In general, the concentrations of trace elements in blood of homebred cows and sheep are in good agreement with reference materials, available literature data and the results of previous studies in the area. The exceptions are Fe, As and Br. The contents of natural and anthropogenic radionuclides in feeds are within the expected levels, and there are no signs of contamination by depleted uranium or other fission products. Apart from Cd, there are no signs of pollution by heavy metals in feeds. The highly sensitive method of instrumental neutron activation analysis provides data on the concentration of some elements in animal blood not previously reported for the region and elsewhere. Recommendations and perspectives The presented study is a part of the long term ongoing project on the health risk assessment on animals and humans in the region. The collected data is intended to provide a base for the animal and human risk assessment as well as an estimate of the general pollution status of the environment in the region. Since some of the investigated elements are classified as important trace elements for livestock, the results could also be used to balance and improve the animal diet and thus, improve the growth and reproduction rate.
T2  - Environmental Science and Pollution Research
T1  - Concentration of trace elements in blood and feed of homebred animals in Southern Serbia
VL  - 17
IS  - 5
SP  - 1119
EP  - 1128
DO  - 10.1007/s11356-009-0274-6
ER  - 

@article{
author = "Popovic, Dragana and Bozic, Tatjana and Stevanović, Jelka and Frontasyeva, Marina and Todorović, Dragana and Ajtić, Jelena V. and Spasić-Jokić, Vesna",
year = "2010",
abstract = "Background, aim and scope The paper presents concentrations of trace elements in blood of homebred animals (cows and sheep) from Southern Serbia (Bujanovac) and the contents of natural and anthropogenic radionuclides and some heavy metals in feed. The region of Southern Serbia was exposed to contamination by depleted uranium ammunition during NATO attacks in 1999 and therefore, is of great concern to environmental pollution and human and animal health. Materials and methods Conventional instrumental and epithermal neutron activation analyses are used to measure trace elements in cow and sheep blood samples collected randomly at six locations in the region of Bujanovac (village of Borovac) in the spring of 2005. Samples of feed (grass and crops: corn, wheat and oats), collected on the same locations (households), are analysed for the contents of radionuclides on an HPGe detector (Ortec, relative efficiency 23%) by standard gamma spectrometry. The content of Hg, Pb and Cd in feed is determined by standard atomic absorption spectrometry on the VarianSpectra220/ThermoSolar GFS97 spectrometer. Results Concentrations of 29 elements (Na, Al (P), Cl, K, Sc, Cr, Mn, Ni, Fe, Co, Zn, Se, As, Br, Sr, Rb, Sb, In, I, Ba, Cs, La, Nd, Eu, Sm, Tb, Hf, Ta and Th) are determined in blood of the examined animals. In feeds, natural 40K is found in all of the samples, cosmogenic Be-7 and fission product Cs-137 are detected only in the grass samples, while heavy metals Hg, Cd and Pb are found in the range of 0.01-0.02, 0.84-1.15 and 0.74-7.34 mg/kg, respectively. Calculated soil-to-blood transfer factors are in a wide range of 8.10(-6) to 64, as a result of varying significance of the elements in animal metabolism and feeding habits. Discussion The results of trace elements concentrations in animal blood are in good agreement with available data for K, Ni, Zn, Se and Rb. Higher Br concentrations in animal blood are most probably caused by large biomass burning events during blood sampling. Very low concentration of Fe in cows and sheep confirms the results of previous biochemical studies on animal anaemia in the region. High concentration of As correlates with geochemical peculiarities of the Balkans and is also likely influenced by the use of pesticides in the agricultural production. For some of the elements (La, Nd, Eu, Sm, Tb, Sb, Hf, Ta, Th, In, Ba, Sr, Sc and Cs), there are few or no literature data. Therefore, some of the presented data are significant not only for the country and the region, but on a wider scale. Activities of natural radionuclides in feeds are within the average values reported for the region, while the activities of Pb-210 and U-235/238 are below the limit of detection. This is in accordance with previous investigations showing no widespread contamination by depleted uranium in the area. Contents of Hg and Pb in feeds are below the nationally permissible levels, unlike the content of Cd which exceeds it, probably caused by the use of phosphate fertilisers and fossil fuel combustion in the area. Conclusions In general, the concentrations of trace elements in blood of homebred cows and sheep are in good agreement with reference materials, available literature data and the results of previous studies in the area. The exceptions are Fe, As and Br. The contents of natural and anthropogenic radionuclides in feeds are within the expected levels, and there are no signs of contamination by depleted uranium or other fission products. Apart from Cd, there are no signs of pollution by heavy metals in feeds. The highly sensitive method of instrumental neutron activation analysis provides data on the concentration of some elements in animal blood not previously reported for the region and elsewhere. Recommendations and perspectives The presented study is a part of the long term ongoing project on the health risk assessment on animals and humans in the region. The collected data is intended to provide a base for the animal and human risk assessment as well as an estimate of the general pollution status of the environment in the region. Since some of the investigated elements are classified as important trace elements for livestock, the results could also be used to balance and improve the animal diet and thus, improve the growth and reproduction rate.",
journal = "Environmental Science and Pollution Research",
title = "Concentration of trace elements in blood and feed of homebred animals in Southern Serbia",
volume = "17",
number = "5",
pages = "1119-1128",
doi = "10.1007/s11356-009-0274-6"
}

Popovic, D., Bozic, T., Stevanović, J., Frontasyeva, M., Todorović, D., Ajtić, J. V.,& Spasić-Jokić, V.. (2010). Concentration of trace elements in blood and feed of homebred animals in Southern Serbia. in Environmental Science and Pollution Research, 17(5), 1119-1128.
https://doi.org/10.1007/s11356-009-0274-6

Popovic D, Bozic T, Stevanović J, Frontasyeva M, Todorović D, Ajtić JV, Spasić-Jokić V. Concentration of trace elements in blood and feed of homebred animals in Southern Serbia. in Environmental Science and Pollution Research. 2010;17(5):1119-1128.
doi:10.1007/s11356-009-0274-6 .

Popovic, Dragana, Bozic, Tatjana, Stevanović, Jelka, Frontasyeva, Marina, Todorović, Dragana, Ajtić, Jelena V., Spasić-Jokić, Vesna, "Concentration of trace elements in blood and feed of homebred animals in Southern Serbia" in Environmental Science and Pollution Research, 17, no. 5 (2010):1119-1128,
https://doi.org/10.1007/s11356-009-0274-6 . .

TY  - CONF
AU  - Beličev, Petar
AU  - Spasić-Jokić, Vesna
AU  - Mayer, S.
AU  - Milosevic, M.
AU  - Ilic, R.
AU  - Pešić, Milan P.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6899
AB  - The Metal -Oxide Semiconductor Field-Effect-Transistor (MOSFET, RadFET) is frequently used as a sensor of ionizing radiation in nuclear-medicine, diagnostic-radiology, radiotherapy quality-assurance and in the nuclear and space industries. We focused our investigations on calculating the energy response of a p-type RadFET to low-energy photons in range from 12 keV to 2 MeV and on understanding the influence of uncertainties in the composition and geometry of the device in calculating the energy response function. All results were normalized to unit air kerma incident on the RadFET for incident photon energy of 1.1 MeV. The calculations of the energy response characteristics of a RadFET radiation detector were performed via Monte Carlo simulations using the MCNPX code and for a limited number of incident photon energies the FOTELP code was also used for the sake of comparison. The geometry of the RadFET was modeled as a simple stack of appropriate materials. Our goal was to obtain results with statistical uncertainties better than 1% (fulfilled in MCNPX calculations for all incident energies which resulted in simulations with 1 - 2x10(9) histories.
C3  - Journal of Physics: Conference Series
T1  - Monte Carlo Calculation of the Energy Response Characteristics of a RadFET Radiation Detector
VL  - 238
DO  - 10.1088/1742-6596/238/1/012030
ER  - 

@conference{
author = "Beličev, Petar and Spasić-Jokić, Vesna and Mayer, S. and Milosevic, M. and Ilic, R. and Pešić, Milan P.",
year = "2010",
abstract = "The Metal -Oxide Semiconductor Field-Effect-Transistor (MOSFET, RadFET) is frequently used as a sensor of ionizing radiation in nuclear-medicine, diagnostic-radiology, radiotherapy quality-assurance and in the nuclear and space industries. We focused our investigations on calculating the energy response of a p-type RadFET to low-energy photons in range from 12 keV to 2 MeV and on understanding the influence of uncertainties in the composition and geometry of the device in calculating the energy response function. All results were normalized to unit air kerma incident on the RadFET for incident photon energy of 1.1 MeV. The calculations of the energy response characteristics of a RadFET radiation detector were performed via Monte Carlo simulations using the MCNPX code and for a limited number of incident photon energies the FOTELP code was also used for the sake of comparison. The geometry of the RadFET was modeled as a simple stack of appropriate materials. Our goal was to obtain results with statistical uncertainties better than 1% (fulfilled in MCNPX calculations for all incident energies which resulted in simulations with 1 - 2x10(9) histories.",
journal = "Journal of Physics: Conference Series",
title = "Monte Carlo Calculation of the Energy Response Characteristics of a RadFET Radiation Detector",
volume = "238",
doi = "10.1088/1742-6596/238/1/012030"
}

Beličev, P., Spasić-Jokić, V., Mayer, S., Milosevic, M., Ilic, R.,& Pešić, M. P.. (2010). Monte Carlo Calculation of the Energy Response Characteristics of a RadFET Radiation Detector. in Journal of Physics: Conference Series, 238.
https://doi.org/10.1088/1742-6596/238/1/012030

Beličev P, Spasić-Jokić V, Mayer S, Milosevic M, Ilic R, Pešić MP. Monte Carlo Calculation of the Energy Response Characteristics of a RadFET Radiation Detector. in Journal of Physics: Conference Series. 2010;238.
doi:10.1088/1742-6596/238/1/012030 .

Beličev, Petar, Spasić-Jokić, Vesna, Mayer, S., Milosevic, M., Ilic, R., Pešić, Milan P., "Monte Carlo Calculation of the Energy Response Characteristics of a RadFET Radiation Detector" in Journal of Physics: Conference Series, 238 (2010),
https://doi.org/10.1088/1742-6596/238/1/012030 . .

TY  - CONF
AU  - Spasić-Jokić, Vesna
AU  - Orlić, Milan P.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6900
AB  - Therapeutic or diagnostic radiopharmaceutical capsule containing (NaI)-I-131 stays in stomach for 15 minutes before the absorption starts, long enough to make possible risky exposure. During the oral application it is reasonable to measure effective dose in stomach. Direct measurements of organ doses are not possible so there is a strong recommendation to estimate them by calculation. The main goal is the I-131 risk assessment. Monte Carlo code MCNP4b was used to model the transport of gamma and beta particles emitted by radionuclide I-131 considered as a point source at the bottom of the stomach. Absorbed energy per unit transformation in stomach and surrounding organs has been calculated. The dose equivalents in these organs have been calculated in aim to determine the effective doses using appropriate tissue weighting factor values. Obtained results had not significant importance for radiation protection but they were important for establishment of new calibration procedures as a part of QA and QC programs in radiopharmaceuticals production and control.
C3  - Journal of Physics: Conference Series
T1  - Monte Carlo Estimation of Patient Effective Dose in Diagnostics Procedures Using I-131
VL  - 238
DO  - 10.1088/1742-6596/238/1/012054
ER  - 

@conference{
author = "Spasić-Jokić, Vesna and Orlić, Milan P.",
year = "2010",
abstract = "Therapeutic or diagnostic radiopharmaceutical capsule containing (NaI)-I-131 stays in stomach for 15 minutes before the absorption starts, long enough to make possible risky exposure. During the oral application it is reasonable to measure effective dose in stomach. Direct measurements of organ doses are not possible so there is a strong recommendation to estimate them by calculation. The main goal is the I-131 risk assessment. Monte Carlo code MCNP4b was used to model the transport of gamma and beta particles emitted by radionuclide I-131 considered as a point source at the bottom of the stomach. Absorbed energy per unit transformation in stomach and surrounding organs has been calculated. The dose equivalents in these organs have been calculated in aim to determine the effective doses using appropriate tissue weighting factor values. Obtained results had not significant importance for radiation protection but they were important for establishment of new calibration procedures as a part of QA and QC programs in radiopharmaceuticals production and control.",
journal = "Journal of Physics: Conference Series",
title = "Monte Carlo Estimation of Patient Effective Dose in Diagnostics Procedures Using I-131",
volume = "238",
doi = "10.1088/1742-6596/238/1/012054"
}

Spasić-Jokić, V.,& Orlić, M. P.. (2010). Monte Carlo Estimation of Patient Effective Dose in Diagnostics Procedures Using I-131. in Journal of Physics: Conference Series, 238.
https://doi.org/10.1088/1742-6596/238/1/012054

Spasić-Jokić V, Orlić MP. Monte Carlo Estimation of Patient Effective Dose in Diagnostics Procedures Using I-131. in Journal of Physics: Conference Series. 2010;238.
doi:10.1088/1742-6596/238/1/012054 .

Spasić-Jokić, Vesna, Orlić, Milan P., "Monte Carlo Estimation of Patient Effective Dose in Diagnostics Procedures Using I-131" in Journal of Physics: Conference Series, 238 (2010),
https://doi.org/10.1088/1742-6596/238/1/012054 . .

TY  - CONF
AU  - Spasić-Jokić, Vesna
AU  - Orlić, Milan P.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6859
AB  - During the oral application of radionuclide therapy it is from the vital importance to measure effective dose in stomach in which the (NaI)-I-131 therapeutic capsule stays during the 15 minutes which is long enough to make risky exposure. As it is not possible to determine it by direct measurements there is a strong recommendation to estimate the dose by calculation. The main goal is to calculate effective dose and risk as a result of I-131 capsules remaining in stomach before the absorption starts. Monte Carlo code MCNP4b was used to model the transport of gamma and beta particles emitted by radionuclide I-131 treated as a point source at the bottom of the stomach. Absorbed energy per unit transformation in stomach and surrounding organs has been calculated. The dose equivalents in these organs have been calculated in aim to determine the effective doses using appropriate tissue weighting factor values. The local doses in stomach wall reached the values in order of several hundreds of grays in a very short time. In such case the traditional concept of risk is not applicable, so it becomes necessary to create the very new concept which is able to cover higher risks under presented circumstances.
T1  - Estimation of Patient Effective Dose from I-131 Using Monte Carlo Calculation
SP  - 1669
EP  - 1673
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6859
ER  - 

@conference{
author = "Spasić-Jokić, Vesna and Orlić, Milan P.",
year = "2009",
abstract = "During the oral application of radionuclide therapy it is from the vital importance to measure effective dose in stomach in which the (NaI)-I-131 therapeutic capsule stays during the 15 minutes which is long enough to make risky exposure. As it is not possible to determine it by direct measurements there is a strong recommendation to estimate the dose by calculation. The main goal is to calculate effective dose and risk as a result of I-131 capsules remaining in stomach before the absorption starts. Monte Carlo code MCNP4b was used to model the transport of gamma and beta particles emitted by radionuclide I-131 treated as a point source at the bottom of the stomach. Absorbed energy per unit transformation in stomach and surrounding organs has been calculated. The dose equivalents in these organs have been calculated in aim to determine the effective doses using appropriate tissue weighting factor values. The local doses in stomach wall reached the values in order of several hundreds of grays in a very short time. In such case the traditional concept of risk is not applicable, so it becomes necessary to create the very new concept which is able to cover higher risks under presented circumstances.",
title = "Estimation of Patient Effective Dose from I-131 Using Monte Carlo Calculation",
pages = "1669-1673",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6859"
}

Spasić-Jokić, V.,& Orlić, M. P.. (2009). Estimation of Patient Effective Dose from I-131 Using Monte Carlo Calculation. , 1669-1673.
https://hdl.handle.net/21.15107/rcub_vinar_6859

Spasić-Jokić V, Orlić MP. Estimation of Patient Effective Dose from I-131 Using Monte Carlo Calculation. 2009;:1669-1673.
https://hdl.handle.net/21.15107/rcub_vinar_6859 .

Spasić-Jokić, Vesna, Orlić, Milan P., "Estimation of Patient Effective Dose from I-131 Using Monte Carlo Calculation" (2009):1669-1673,
https://hdl.handle.net/21.15107/rcub_vinar_6859 .

TY  - CONF
AU  - Spasić-Jokić, Vesna
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6788
AB  - Positron Emission Tomography (PET) is a radiotracer imaging technique, in which tracer compounds labelled with positron-emitting radionuclides are injected into the subject of the study. One of the prime reasons for the importance of PET in medical research and practice is the existence of positron-emitting isotopes of elements Such as carbon, nitrogen, oxygen and fluorine, which may be processed to create a range of tracer compounds which are similar to naturally occurring substances in the body. The largest area of clinical use of PET is in oncology, cardiology and neurology. The most widely used tracer in oncology is (18)F-fluoro-deoxy-glucose (EDG) which follows a similar metabolic pathway to glucose in vivo, except that it is not metabolised to CO, and water, but remains trapped within a tissue. This makes it well-suited to use as a glucose uptake tracer. This is of interest in oncology because proliferating cancer cells have a higher than average rate of glucose metabolism. (11)C-methionine is also used in oncology, where it acts as a marker for protein synthesis. In our country, one of the experimental channels Of TESLA Accelerator Installation will be used for production Of long-living positron emitters (e.g. (124)I, (86)Y, (76)Br, (64)Cu) and alpha emitters (e.g. (211)At and (149)Tb).
C3  - Environmental, Health and Humanity Issues in the Down Danubian Region: Multidisciplinary Approaches
T1  - Positron Emission Tomography (Pet) in Medical Imaging
SP  - 15
EP  - 24
DO  - 10.1142/9789812834409_0002
ER  - 

@conference{
author = "Spasić-Jokić, Vesna",
year = "2009",
abstract = "Positron Emission Tomography (PET) is a radiotracer imaging technique, in which tracer compounds labelled with positron-emitting radionuclides are injected into the subject of the study. One of the prime reasons for the importance of PET in medical research and practice is the existence of positron-emitting isotopes of elements Such as carbon, nitrogen, oxygen and fluorine, which may be processed to create a range of tracer compounds which are similar to naturally occurring substances in the body. The largest area of clinical use of PET is in oncology, cardiology and neurology. The most widely used tracer in oncology is (18)F-fluoro-deoxy-glucose (EDG) which follows a similar metabolic pathway to glucose in vivo, except that it is not metabolised to CO, and water, but remains trapped within a tissue. This makes it well-suited to use as a glucose uptake tracer. This is of interest in oncology because proliferating cancer cells have a higher than average rate of glucose metabolism. (11)C-methionine is also used in oncology, where it acts as a marker for protein synthesis. In our country, one of the experimental channels Of TESLA Accelerator Installation will be used for production Of long-living positron emitters (e.g. (124)I, (86)Y, (76)Br, (64)Cu) and alpha emitters (e.g. (211)At and (149)Tb).",
journal = "Environmental, Health and Humanity Issues in the Down Danubian Region: Multidisciplinary Approaches",
title = "Positron Emission Tomography (Pet) in Medical Imaging",
pages = "15-24",
doi = "10.1142/9789812834409_0002"
}

Spasić-Jokić, V.. (2009). Positron Emission Tomography (Pet) in Medical Imaging. in Environmental, Health and Humanity Issues in the Down Danubian Region: Multidisciplinary Approaches, 15-24.
https://doi.org/10.1142/9789812834409_0002

Spasić-Jokić V. Positron Emission Tomography (Pet) in Medical Imaging. in Environmental, Health and Humanity Issues in the Down Danubian Region: Multidisciplinary Approaches. 2009;:15-24.
doi:10.1142/9789812834409_0002 .

Spasić-Jokić, Vesna, "Positron Emission Tomography (Pet) in Medical Imaging" in Environmental, Health and Humanity Issues in the Down Danubian Region: Multidisciplinary Approaches (2009):15-24,
https://doi.org/10.1142/9789812834409_0002 . .

TY  - CONF
AU  - Spasić-Jokić, Vesna
AU  - Popovic, D. Lj.
AU  - Stanković, Slaviša
AU  - Zupunski, I. Z.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6786
AB  - The paper presents new courses in medical physics, medical engineering and bio/physics for clinical engineers, medicine and veterinary medicine specialists introduced at two universities in Serbia - University of Novi Sad and University in Belgrade since 2004. The courses were aimed to educate well trained specialists in medical physics, medical engineering and veterinary medicine and to establish new programs in specialist studies incorporated in CPD programs for professional licensing.
C3  - IFMBE Proceedings
T1  - New courses in medical engineering, medical physics and bio/physics for clinical engineers, medicine and veterinary medicine specialists in Serbia
VL  - 16
IS  - 1-2
SP  - 310
EP  - +
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6786
ER  - 

@conference{
author = "Spasić-Jokić, Vesna and Popovic, D. Lj. and Stanković, Slaviša and Zupunski, I. Z.",
year = "2007",
abstract = "The paper presents new courses in medical physics, medical engineering and bio/physics for clinical engineers, medicine and veterinary medicine specialists introduced at two universities in Serbia - University of Novi Sad and University in Belgrade since 2004. The courses were aimed to educate well trained specialists in medical physics, medical engineering and veterinary medicine and to establish new programs in specialist studies incorporated in CPD programs for professional licensing.",
journal = "IFMBE Proceedings",
title = "New courses in medical engineering, medical physics and bio/physics for clinical engineers, medicine and veterinary medicine specialists in Serbia",
volume = "16",
number = "1-2",
pages = "310-+",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6786"
}

Spasić-Jokić, V., Popovic, D. Lj., Stanković, S.,& Zupunski, I. Z.. (2007). New courses in medical engineering, medical physics and bio/physics for clinical engineers, medicine and veterinary medicine specialists in Serbia. in IFMBE Proceedings, 16(1-2), 310-+.
https://hdl.handle.net/21.15107/rcub_vinar_6786

Spasić-Jokić V, Popovic DL, Stanković S, Zupunski IZ. New courses in medical engineering, medical physics and bio/physics for clinical engineers, medicine and veterinary medicine specialists in Serbia. in IFMBE Proceedings. 2007;16(1-2):310-+.
https://hdl.handle.net/21.15107/rcub_vinar_6786 .

Spasić-Jokić, Vesna, Popovic, D. Lj., Stanković, Slaviša, Zupunski, I. Z., "New courses in medical engineering, medical physics and bio/physics for clinical engineers, medicine and veterinary medicine specialists in Serbia" in IFMBE Proceedings, 16, no. 1-2 (2007):310-+,
https://hdl.handle.net/21.15107/rcub_vinar_6786 .

TY  - CONF
AU  - Stanković, Slobodanka R.
AU  - Veskovic, Miroslav
AU  - Klisuric, Olivera
AU  - Spasić, Vesna
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6662
AB  - Overview of new educational program and training in Medical Physics at the University of Novi Sad is presented, where the medical physics education from undergraduate to doctoral study is established in the last decade. Necessity for basic and additional education and hospital training for medical physicists becomes the evident subject in clinical practice in which physicists and physicians are in close collaboration to ensure high quality of patient care. Learning objectives: to incorporate the latest scientific and professional findings in the field of medical physics, medical diagnostics, therapy and instruments; to accomodate students pursuits of individual fields by offering elective courses from different areas of current medical practice; to reflect the multidisciplinary spirit of the studies, since teaching is performed by experts from diverse fields.
C3  - AIP Conference Proceedings
T1  - Medical physics education at the University of Novi Sad - Serbia
VL  - 899
SP  - 515
EP  - +
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6662
ER  - 

@conference{
author = "Stanković, Slobodanka R. and Veskovic, Miroslav and Klisuric, Olivera and Spasić, Vesna",
year = "2007",
abstract = "Overview of new educational program and training in Medical Physics at the University of Novi Sad is presented, where the medical physics education from undergraduate to doctoral study is established in the last decade. Necessity for basic and additional education and hospital training for medical physicists becomes the evident subject in clinical practice in which physicists and physicians are in close collaboration to ensure high quality of patient care. Learning objectives: to incorporate the latest scientific and professional findings in the field of medical physics, medical diagnostics, therapy and instruments; to accomodate students pursuits of individual fields by offering elective courses from different areas of current medical practice; to reflect the multidisciplinary spirit of the studies, since teaching is performed by experts from diverse fields.",
journal = "AIP Conference Proceedings",
title = "Medical physics education at the University of Novi Sad - Serbia",
volume = "899",
pages = "515-+",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6662"
}

Stanković, S. R., Veskovic, M., Klisuric, O.,& Spasić, V.. (2007). Medical physics education at the University of Novi Sad - Serbia. in AIP Conference Proceedings, 899, 515-+.
https://hdl.handle.net/21.15107/rcub_vinar_6662

Stanković SR, Veskovic M, Klisuric O, Spasić V. Medical physics education at the University of Novi Sad - Serbia. in AIP Conference Proceedings. 2007;899:515-+.
https://hdl.handle.net/21.15107/rcub_vinar_6662 .

Stanković, Slobodanka R., Veskovic, Miroslav, Klisuric, Olivera, Spasić, Vesna, "Medical physics education at the University of Novi Sad - Serbia" in AIP Conference Proceedings, 899 (2007):515-+,
https://hdl.handle.net/21.15107/rcub_vinar_6662 .

TY  - JOUR
AU  - Ilić, Radovan D.
AU  - Spasić-Jokić, Vesna
AU  - Beličev, Petar
AU  - Dragovic, M
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6497
AB  - This paper describes the application of the SRNA Monte Carlo package for proton transport simulations in complex geometry and different material compositions. The SRNA package was developed for 3D dose distribution calculation in proton therapy and dosimetry and it was based on the theory of multiple scattering. The decay of proton induced compound nuclei was simulated by the Russian MSDM model and our own using ICRU 63 data. The developed package consists of two codes: the SRNA-2KG, which simulates proton transport in combinatorial geometry and the SRNA-VOX, which uses the voxelized geometry using the CT data and conversion of the Hounsfields data to tissue elemental composition. Transition probabilities for both codes are prepared by the SRNADAT code. The simulation of the proton beam characterization by multi-layer Faraday cup, spatial distribution of positron emitters obtained by the SRNA-2KG code and intercomparison of computational codes in radiation dosimetry, indicate immediate application of the Monte Carlo techniques in clinical practice. In this paper, we briefly present the physical model implemented in the SRNA package, the ISTAR proton dose planning software, as well as the results of the numerical experiments with proton beams to obtain 3D dose distribution in the eye and breast tumour.
T2  - Physics in Medicine and Biology
T1  - Monte Carlo SRNA-VOX code for 3D proton dose distribution in voxelized geometry using CT data
VL  - 50
IS  - 5
SP  - 1011
EP  - 1017
DO  - 10.1088/0031-9155/50/5/023
ER  - 

@article{
author = "Ilić, Radovan D. and Spasić-Jokić, Vesna and Beličev, Petar and Dragovic, M",
year = "2005",
abstract = "This paper describes the application of the SRNA Monte Carlo package for proton transport simulations in complex geometry and different material compositions. The SRNA package was developed for 3D dose distribution calculation in proton therapy and dosimetry and it was based on the theory of multiple scattering. The decay of proton induced compound nuclei was simulated by the Russian MSDM model and our own using ICRU 63 data. The developed package consists of two codes: the SRNA-2KG, which simulates proton transport in combinatorial geometry and the SRNA-VOX, which uses the voxelized geometry using the CT data and conversion of the Hounsfields data to tissue elemental composition. Transition probabilities for both codes are prepared by the SRNADAT code. The simulation of the proton beam characterization by multi-layer Faraday cup, spatial distribution of positron emitters obtained by the SRNA-2KG code and intercomparison of computational codes in radiation dosimetry, indicate immediate application of the Monte Carlo techniques in clinical practice. In this paper, we briefly present the physical model implemented in the SRNA package, the ISTAR proton dose planning software, as well as the results of the numerical experiments with proton beams to obtain 3D dose distribution in the eye and breast tumour.",
journal = "Physics in Medicine and Biology",
title = "Monte Carlo SRNA-VOX code for 3D proton dose distribution in voxelized geometry using CT data",
volume = "50",
number = "5",
pages = "1011-1017",
doi = "10.1088/0031-9155/50/5/023"
}

Ilić, R. D., Spasić-Jokić, V., Beličev, P.,& Dragovic, M.. (2005). Monte Carlo SRNA-VOX code for 3D proton dose distribution in voxelized geometry using CT data. in Physics in Medicine and Biology, 50(5), 1011-1017.
https://doi.org/10.1088/0031-9155/50/5/023

Ilić RD, Spasić-Jokić V, Beličev P, Dragovic M. Monte Carlo SRNA-VOX code for 3D proton dose distribution in voxelized geometry using CT data. in Physics in Medicine and Biology. 2005;50(5):1011-1017.
doi:10.1088/0031-9155/50/5/023 .

Ilić, Radovan D., Spasić-Jokić, Vesna, Beličev, Petar, Dragovic, M, "Monte Carlo SRNA-VOX code for 3D proton dose distribution in voxelized geometry using CT data" in Physics in Medicine and Biology, 50, no. 5 (2005):1011-1017,
https://doi.org/10.1088/0031-9155/50/5/023 . .