Dosimetric Characteristics Study on the Ir-192 High Dose Rate by Monte Carlo Simulation
WU Xiaowei1, CUI Xiangli1, LIU Zicheng1,2, LIU Lingling1
1. Radiotherapy Center, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei Anhui 230031, China;
2. School of Biomedical Engineering, Anhui Medical University, Hefei Anhui 230032, China
Abstract：Objective To simulate the dose rate distribution of domestic high dose rate Ir-192 with the help of the program MCNP5
using Monte Carlo simulation technology. Methods Based on TG43 protocol, the Ir-192 modelling was established through MCNP5
code. At then, the distribution of dose rate in space was simulated with this modeling. From the simulation, the radial dose function
and anisotropy function were obtained. Results The simulated anisotropy function was in agreement with the published results within
the error range. When the radial distance was small, the radial dose function agreed with each other in the small radial distance; for
the big radial distance, the radial dose function was only agree with some published results. The largest relative difference was 24%
at radial distance 15 cm. Conclusion The Monte Carlo technique based on MCNP5 can better simulate the dosimetry characteristics
of domestic high-dose rate iridium source, which lays a theoretical foundation for further exploring the factors affecting the dose
distribution of radiotherapy after loading.
吴晓维1，崔相利1，刘子成1,2，刘苓苓1. 高剂量率铱源剂量学特征的蒙特卡罗模拟研究[J]. 中国医疗设备, 2022, 37(4): 6-9.
WU Xiaowei1, CUI Xiangli1, LIU Zicheng1,2, LIU Lingling1. Dosimetric Characteristics Study on the Ir-192 High Dose Rate by Monte Carlo Simulation. China Medical Devices, 2022, 37(4): 6-9.
