Iranian Journal of Medical Physics

Iranian Journal of Medical Physics

Determination of Dosimetric characteristics of a New 192Ir-PDR Brachytherapy Source According to AAPM TG- 43 Protocol using Monte Carlo simulation technique

Document Type : Conference Proceedings

Authors
Vahid Lohrabian 1
Ali Reza Kamali-Asl 1
Mohammad Reza Javanshir 2
Nematollah Heidarloo 1
Hamid Reza Hemmati 1
1 Radiation Medicine Engineering Department, Shahid Beheshti University, GC, Tehran, Iran
2 Nuclear Science Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
10.22038/ijmp.2018.13065
Abstract
Introduction: 192Ir is one of the important sources frequently used in brachytherapy. Up to now, a lot of commercial models of this source have been made which Ir-192 has been recently added to them. The aim of the present study is to determine the dosimetric parameters of this new source model based on the recommendations of TG-43(U1) protocol using Monte Carlo simulation technique.
 
Materials and Methods: The assessed parameters included dose rate constant, radial dose function, anisotropy function, and dose distribution around the source. Calculations were performed in water phantom using MCNP4C Monte Carlo code.
Results: The dose rate constant of this new source in water was 1.07+0.06 cGyh-1U-1 which was   in   a   good   agreement   with   the    TLD    measured    data    (1.13+0.07    cGyh-    1U-1).
Conclusion: The results of this study showed that the dosimetric characteristics of this new brachytherapy source are comparable with those of other commercially available sources. Furthermore, the simulated parameters were in accordance with the previously measured ones. This means that the Monte Carlo simulated dosimetric parameters could be employed to obtain the dose distribution around this new brachytherapy source based on TG-43(U1) protocol.
Keywords
192Ir
Brachytherapy Dosimetry AAPM
TG43U1 MCNP4C

  • Receive Date 21 May 2018
  • Revise Date 14 May 2019
  • Accept Date 06 July 2018