| 李明生,马向捷,袁继龙,等.快速布拉格峰探测器的应用与分析[J].中华放射医学与防护杂志,2026,46(6):599-604.Li Mingsheng,Ma Xiangjie,Yuan Jilong,et al.Application of rapid Bragg peak detector and analysis of its measurement accuracy[J].Chin J Radiol Med Prot,2026,46(6):599-604 |
| 快速布拉格峰探测器的应用与分析 |
| Application of rapid Bragg peak detector and analysis of its measurement accuracy |
| 投稿时间：2025-07-21 |
| DOI：10.3760/cma.j.cn112271-20250721-00258 |
| 中文关键词: 快速布拉格峰探测器|质子射程|Geant4|布拉格峰 |
| 英文关键词:Rapid Bragg peak detector|Proton range|Geant4|Bragg peak |
| 基金项目: |
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| 中文摘要: |
| 目的 验证国内首台质子重离子射程质量控制检测设备(快速布拉格峰探测器)的可行性及质子束流射程测量结果的精确度。方法 采用该快速布拉格峰探测器,分别在标准模式与精细模式下测量质子束流射程;参照探测器工作原理,利用Geant4程序构建对应物理模型,通过模拟不同层厚下的布拉格峰位置及射程数据,分析探测器测量结果的精确度。结果 快速布拉格峰探测器在两种模式下均完成3挡能量质子的射程测量;Geant4模拟覆盖17挡质子能量,其中1 mm层厚下射程最大偏差为0.48 mm,0.25 mm层厚下最大偏差为0.14 mm。结论 快速布拉格峰探测器的测量精确度满足相关标准中"射程偏差在±1 mm范围内"的要求,可用于质子重离子加速器的验收检测与常规质量控制;该设备填补了国内质子重离子质量控制检测领域的技术空白,满足了相关机构对国产化同类设备的需求。 |
| 英文摘要: |
| Objective To validate the feasibility of China's first proton heavy ion range quality control testing device (rapid Bragg peak detector) and the accuracy of the proton range measurement. Methods The rapid bragg peak detector was employed to measure proton beam range in both standard and fine modes. Based on the detector's operating principle, the Geant4 program was used to construct corresponding physical models. By simulating the positions of Bragg peaks and range data at different layer thicknesses, the accuracy of detector measurement result were analyzed. Results By employing the rapid bragg peak detector and reference to the operating principle of detector, the range measurements for protons at three energy levels were completed in both modes. Geant4 simulations covered 17 proton energy levels, with maximum range deviations of 0.48 mm at 1 mm layer thickness and 0.14 mm at 0.25 mm layer thickness. Conclusions The measurement accuracy of the rapid Bragg peak detector meets the requirement of "range deviation within ±1 mm" specified in relevant standards. It can be used for acceptance testing and routine quality control of proton and heavy ion accelerators. This device fills a technical gap in domestic quality control testing for proton and heavy-ion radiotherapy, meeting the application needs of relevant institutions for domestically produced equipment of the same kind. |
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