利用Monte Carlo方法模拟放射治疗剂量分布,改写现有的放射治疗软件DPM,并进行剂量计算。与图形处理方便的Matlab软件相结合,给出直观的显示结果。该方法是一个很有前景的研究方向,因为它既可以获得很快的仿真速度,又能得到直观的仿真结果图形。运行结果表明剂量计算能在1min之内完成,计算速度和精度满足要求。该方法对于提高放射治疗水平具有重要的指导意义和应用价值。 Monte Carlo method to simulate radiation dose distribution, rewrite the existing radiotherapy software DPM, and dose calculation. Combined with the easy-to-use Matlab software, intuitive display results are given. This method is a promising research direction, because it can get fast simulation speed, but also get an intuitive simulation results graphics. Operation results show that the dose calculation can be completed within 1min, the calculation speed and accuracy meet the requirements. The method has important guiding significance and application value for improving the level of radiation therapy.