跨模态剂量计审计在头部和部放射治疗中:对光子和质子束的幻影方法
Sornjarod Oonsiri1, Sakda Kingkaew1, Mananchaya Vimolnoch1
1Department of Radiology, Division of Radiation Oncology, King Chulalongkorn Memorial Hospital, The Thai Red Cross Society, Bangkok, Thailand.
Journal of medical physics
|October 30, 2025
概括
在光子和质子辐射疗法平台上,使用人类形象幻影进行端到端 (E2E) 测试是可行的. 这种剂量测量审计工具对于缺乏国家计划的先进技术中心来说是有价值的.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 剂量测量方法 剂量测量方法
背景情况:
- 先进的放射治疗技术需要强有力的质量保证.
- 端到端 (E2E) 测试提供治疗交付的全面评估.
- 人形幻象模拟患者解剖学,进行现实的测试.
研究的目的:
- 实施和评估E2E测试的头部和部 (H&N) 幻影在不同的放射治疗方式.
- 评估这个E2E测试对光子和质子疗法平台的可行性.
主要方法:
- 使用CIRS SHANE的人形幻影进行E2E测试.
- 测试了多个Varian系统 (Clinac iX,TrueBeam,Halcyon,ETHOS) 和一个ProBeam系统.
- 在计划目标体积 (PTV) 和脊髓中使用电离室进行了剂量测量.
主要成果:
- 在不同方式之间没有发现显著的剂量/体积参数差异 (P=0.976).
- 变量真光束显示了最大的剂量差异 (-3.7%);O环门架系统 (Halcyon,ETHOS) 的偏差较小.
- Varian ETHOS使用了最多的监控单元 (641.6),Clinac iX使用了最少的 (407.0);ProBeam产生了良好的结果.
结论:
- 使用人类形态的H&N幻影进行E2E测试在光子和质子辐射疗法中是可行的.
- 这种方法作为一个有价值的剂量计审计工具,用于拥有先进放射治疗技术的中心.
- 对于那些无法使用国家剂量计审计计划的中心来说,它特别有益.
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