辐射防护 ›› 2024, Vol. 44 ›› Issue (5): 483-489.

• 辐射防护评价 • 上一篇    下一篇

Probeam型医用质子治疗系统机房屏蔽分析与测量结果比较

姜文华1, 涂彧2, 薛惠元2, 李亚东1, 张洁1   

  1. 1.生态环境部核与辐射安全中心辐射源部,北京 102488;
    2.苏州大学放射医学与防护学院,江苏 苏州 215000
  • 收稿日期:2023-04-28 出版日期:2024-09-20 发布日期:2024-11-05
  • 作者简介:姜文华(1981—),女,2008年苏州大学放射医学硕士研究生毕业,高级工程师。E-mail:jiangwenhua@chinansc.cn

Comparison of analysis and measurement results for a 250 MeV medical proton therapy facility shielding

JIANG Wenhua1, TU Yu2, XUE Huiyuan2, LI Yadong1, ZHANG Jie1   

  1. 1. Radiation Source Department, Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 102488;
    2. School of Radiation Medicine and Protection, Soochow University, Jiangsu Suzhou 215000
  • Received:2023-04-28 Online:2024-09-20 Published:2024-11-05

摘要: 质子治疗系统使用能量在70~250 MeV范围内的质子进行肿瘤治疗,损失或预期使用的质子与靶物体产生能量范围宽、角度分布差异大的中子谱,成为质子治疗系统屏蔽设计的主要考虑源项。本文采用点核模型估算Probeam型质子治疗系统机房外中子周围剂量当量率,与测量结果进行比较分析,验证屏蔽结构的有效性。

关键词: 医用质子加速器, 估算, 监测, 中子周围剂量当量

Abstract: Proton energy in the range of 70-250 MeV are used for tumor therapy. The neutron spectrum, which has wide energy range and large angle distribution difference, generated in target object bombarded by protons which may escape or expected to be stopped in the target is the main source term for the shielding design of proton therapy system. In this paper, the point kernel model is adopted to estimate the ambient neutron dose equivalent rate outside the Probeam proton therapy system tunnel. Estimation results are compared with the measured results to verify the effectiveness of the shielding construction.

Key words: medical proton accelerator, estimation, monitoring, ambient neutron dose equivalent

中图分类号: 

  • R144