【摘要】 目的:通过比较电离室测量及蒙特卡罗计算结果,确定加速器治疗头的入射电子束参数。方法:用EGSnrc/BEAMnrc程序对Varian Clinac 23EX加速器6MV X线进行模拟,分析入射电子束参数对百分深度剂量和离轴比的影响。结果:电离室测量结果和蒙特卡罗计算结果一致性较好。结论:蒙特卡罗方法可用于加速器X射线的模拟,模拟结果可用于进一步的研究工作。更多还原

【Abstract】 Objective: The beam data is compared with those obtained from Monte Carlo(MC) simulation and measurement to determine the incident electron beam parameters of accelerator head. Methods: EGSnrc/BEAMnrc code is used to simulate 6 MV X-ray of Varian Clinac 23 EX accelerator, and the influence of incident electron beam parameters on percentage depth dose and off-axis ratio is analyzed. Results: The measurement results of ionization chamber are in good agreement with Monte Carlo calculation results. Conclusion: Monte Carlo method can be used to simulate the X-ray of accelerator, and the simulation results can be used for further research更多还原