Determination of TG-43 dosimetric parameters for photon emitting brachytherapy sources

Mozaffari, A. and Ghorbani, M. (2019) Determination of TG-43 dosimetric parameters for photon emitting brachytherapy sources. Journal of Biomedical Physics and Engineering, 9 (4). pp. 425-436.

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Abstract

Objective: Brachytherapy sources are widely used for the treatment of cancer. The report of Task Group No. 43 (TG-43) of American Association of Physicists in Medicine is known as the most common method for the determination of dosimetric parameters for brachytherapy sources. The aim of this study is to obtain TG-43 dosimetric parameters for 60Co, 137Cs, 192Ir and 103Pd brachytherapy sources by Monte Carlo simulation. Methods: In this study, 60Co (model Co0.A86), 137Cs (model 6520-67), 192Ir (model BEBIG) and 103Pd (model OptiSeed) brachytherapy sources were simulated using MCNPX Monte Carlo code. To simulate the sources, the exact geometric characterization of each source was defined in Monte Carlo input programs. Dosimetric parameters including air kerma strength, dose rate constant, radial dose function and anisotropy function were calculated for each source. Each input program was run with sufficient number of particle histories. The maximum type A statistical uncertainty in the simulation of the 60Co, 137Cs, 192Ir and 103Pd sources, were equal to 4, 4, 3.19 and 6.50, respectively. Results: The results for dosimetry parameters of dose rate constant, radial dose function and anisotropy function for the 60Co, 137Cs, 192Ir and 103Pd sources in this study demonstrated good agreement with other studies. Conclusion: Based on the good agreement between the results of this study and other studies, the TG-43 results for Co0.A86 60Co, 67-65200 137Cs, BEBIG 192Ir and OptiSeed 103Pd sources are validated and can be used as input data in treatment planning systems (TPSs) and to validate the TPS calculations. © 2019, Shiraz University of Medical Sciences. All rights reserved.

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Ghorbani, M.; Medical Physics Department, Faculty of Medicine, Mashhad University of Medical Sciences, Pardise Daneshgah, Azadi Square., Iran; email: mhdghorbani@gmail.com
Uncontrolled Keywords: 103Pd 137Cs 192Ir 60Co Brachytherapy Monte carlo method TG-43 dosimetric parameters cesium 137 cobalt 60 iridium 192 palladium 103 anisotropy Article density dosimetry electron energy geometry light scattering photon radiation dose radiation dose distribution thickness treatment planning
Subjects: QT physiology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib1 lib1
Date Deposited: 21 Jun 2020 09:28
Last Modified: 21 Jun 2020 09:28
URI: http://eprints.mums.ac.ir/id/eprint/18552

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