医用电子直线加速器迷路设计蒙特卡罗模拟分析  

Monte Carlo simulation analysis of the design of a medical electron linear accelerator maze

作　　者：佟鹏[1] 侯长松[1] 陆见霏 朱卫国[1] TONG Peng;HOU Changsong;LU Jianfei;ZHU Weiguo(National Institute for Radiological Protection,China CDC,Key Laboratory of Radiological Protection and Nuclear Emergency,Chinese Center for Disease Control and Prevention,Beijing 100088 China)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所、辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088

出　　处：《中国辐射卫生》2024年第3期248-253,272,共7页Chinese Journal of Radiological Health

摘　　要：目的分析医用电子直线加速器不同迷宫结构对机房门口辐射水平的影响。方法采用蒙特卡罗模拟方法,对比了2种不同迷宫宽度的加速器机房辐射场分布,并对辐射水平进行分析。结果迷路宽大的加速器机房门口的辐射水平明显高于迷路紧凑的加速器机房门口的辐射水平,窄迷路模型机房门口的中子辐射水平相较宽迷路模型下降了38.6%,X射线辐射水平也有下降的趋势。结论在设计医用电子直线加速器时,应采用紧凑的迷宫结构,以减少无效空间设置,从而降低机房门口的辐射水平,提高辐射防护效果。Objective To analyze the impact of different maze structures of medical electron linear accelerator on the radiation level at the entrance of the treatment room.Methods The Monte Carlo simulation method was used to compare the radiation field distribution in two accelerator rooms with different maze widths and to conduct a detailed analysis of the radiation levels.Results The radiation level at the entrance of the accelerator room with a wide maze was significantly higher than that at the entrance of a compact maze.The neutron radiation level at the entrance of the narrow maze model decreased by 38.6%compared to the wide maze model,and the level of X-ray radiation also showed a declining trend.Conclusion When designing medical electron linear accelerators,a compact maze structure should be adopted to reduce the setting of unnecessary space,thereby lowering the radiation level at the entrance of the treatment room and enhancing the effectiveness of radiation protection.

关 键 词：放射治疗 迷路设计 辐射防护 

分 类 号：X591[环境科学与工程—环境工程]