期刊论文

Monte Carlo-based simulation of influence of linear accelerator beam parameter on percentage depth dose

中文

中华放射医学与防护杂志

0254-5098

2018

38

2

145-149

10.3760/cma.j.issn.0254-5098.2018.02.013

湖南省自然科学基金（2016JJ3108） 湖南省重点研发计划项目（2015SK2022）

本校为第一机构

目的通过蒙特卡罗方法模拟瓦里安IX 6 MV直线加速器治疗机头,得到不同射野下的最适电子线能量,研究径向强度分布对百分深度剂量的影响。方法首先对所研究的每个射野,保持径向强度大小不变,改变电子线能量,将得到的百分深度剂量与测量值进行对比,得到该射野下的最适电子线能量。随后将电子线能量设置为得到的最适值,改变径向强度分布大小,研究其对百分深度剂量的影响。结果对于4 cm×4 cm、 10 cm×10 cm、 20 cm×20 cm和30 cm×30 cm的射野,最适能量分别为5.9、 6.0、 6.3和6.4 MeV;改变径向强度分布对4 cm×4 cm、 10 cm×10 cm射野下的百分深度剂量没有影响,对20 cm×20 cm和30 cm×30 cm的射...

Objective To determine the optimal electron beam energy at different field size through a Monte Carlo-based simulation of the therapy head of Varian IX 6 MV linear accelerator so as to study the influence of radial intensity on depth dose. Methods Firstly, keeping the radial intensity unchanged for the field of interest while changing electron beam energy, compassion was carried out of calculated percentage depth doses between measured values. Thus, the optimal energy was identified for this field size. Then, the obtained energy was set the opt...