Dosimetric characterization of an 192Ir brachytherapy source with the Monte Carlo code PENELOPE |
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| Authors: | Francisco Javier Casado Salvador García-Pareja Elena Cenizo Beatriz Mateo Coral Bodineau Pedro Galán |
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| Affiliation: | 1. School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin 150001, China;2. School of Physics, University of Melbourne, VIC 3010, Australia;3. Research Center of Basic Space Science, Harbin Institute of Technology, Harbin 150001, China;4. Microelectronics Center, Harbin Institute of Technology, Harbin 150001, China;1. Department of Radiation Oncology, Rhode Island Hospital, Brown University, Providence, RI;2. Department of Radiation Oncology, Tufts Medical Center, Tufts University, Boston, MA;1. Instituto de Fisica Arroyo Seco, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNICEN), Campus Universitario, Pinto 399, 7000 Tandil, Buenos Aires, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, 1033 Buenos Aires, Argentina;3. Dresden University of Technology, Institute of Nuclear and Particle Physics, Radiation Physics Group, 01069 Dresden, Germany;1. Division de Physique, CRNA, 02 Bd. Frantz Fanon, B.P. 399 Alger-gare, Algiers, Algeria;2. Division de Technologie Nucléaire, CRNB, B.P. 180 Ain-Oussara, Djelfa, Algeria;3. Université des Sciences et Technologie H. Boumediene (USTHB), Faculté de Physique, B.P. 32, 16111 Bab-Ezzouar, Algiers, Algeria;1. Departamento de Física, Universidade Federal de Sergipe, Prof. José Aloísio de Campos, São Cristóvão, SE, Brazil;2. Medical Physics Department, Hospital CHAMA, Arapiraca, AL, Brazil;2. Department of Radiation Oncology, Acibadem University, Istanbul, Turkey;3. Institute of Biomedical Engineering, Bogazici University Istanbul, Turkey;4. Istanbul University, Institute of Oncology, Istanbul, Turkey |
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| Abstract: | Monte Carlo calculations are highly spread and settled practice to calculate brachytherapy sources dosimetric parameters. In this study, recommendations of the AAPM TG-43U1 report have been followed to characterize the Varisource VS2000 192Ir high dose rate source, provided by Varian Oncology Systems.In order to obtain dosimetric parameters for this source, Monte Carlo calculations with PENELOPE code have been carried out. TG-43 formalism parameters have been presented, i.e., air kerma strength, dose rate constant, radial dose function and anisotropy function. Besides, a 2D Cartesian coordinates dose rate in water table has been calculated. These quantities are compared to this source reference data, finding results in good agreement with them.The data in the present study complement published data in the next aspects: (i) TG-43U1 recommendations are followed regarding to phantom ambient conditions and to uncertainty analysis, including statistical (type A) and systematic (type B) contributions; (ii) PENELOPE code is benchmarked for this source; (iii) Monte Carlo calculation methodology differs from that usually published in the way to estimate absorbed dose, leaving out the track-length estimator; (iv) the results of the present work comply with the most recent AAPM and ESTRO physics committee recommendations about Monte Carlo techniques, in regards to dose rate uncertainty values and established differences between our results and reference data.The results stated in this paper provide a complete parameter collection, which can be used for dosimetric calculations as well as a means of comparison with other datasets from this source. |
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