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使用多层法拉第收集器进行质子束范围和电荷验证

Ping L Yeap^1,2, Kah S Lew^1,3, Wei Y C Koh¹

¹Division of Radiation Oncology, National Cancer Centre Singapore, Singapore, Singapore.

Technology in cancer research & treatment

|July 25, 2024

概括

一个新的多层法拉第收集器 (MLFC) 提供了一种快速而准确的质量保证方法,用于质子疗法. 这个工具验证了质子束的范围和电荷,提高了治疗效率和患者安全.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
微粒疗法是一种微粒疗法.

背景情况:

质子疗法需要每天进行质量保证 (QA),以确保精确的光束能量和总电荷.
精确的范围验证对于有效的瘤辐射和最大限度地减少健康组织损伤至关重要.

研究的目的:

提出并验证一种使用多层法拉第收集器 (MLFC) 验证质子束范围和总电荷的时间效率高的方法.
为了提高质子疗法QA程序的工作流效率.

主要方法:

使用了一台MLFC-128-250 MeV,配有128层铜,用于测量质子束的电荷沉积.
集成电荷测量使用多通道电表来确定光束范围.
将MLFC衍生范围和充电数据与已建立的水箱测量和处理计划系统模型进行比较.

主要成果:

根据MLFC确定的质子束范围与调试水箱测量密切相关,校准后最大偏差为0.4g/cm2.
MLFC范围测量显示了多周的稳定性和独立于监测单元和源至表面距离.
通过MLFC收集的总电荷与光束模型对中低范围能量的理论电荷密切匹配.

结论:

MLFC已成功校准并投入使用,作为验证质子束范围和总电荷的可靠工具.
预计MLFC的实施将显著提高每日质子疗法QA工作流程的效率.

关键词:

多层法拉第收集器质子束疗法是一种质子束疗法.质子范围的质子范围.质量保证质量保证质量保证

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