实时运动建模和碳离子治疗中不规则运动的治疗验证:可行性研究
C Galeone1,2,3, A Nakas4, M Donetti5
1Biophysics, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Darmstadt, Germany.
Physics in medicine and biology
|July 29, 2025
概括
这项研究引入了碳离子治疗的新型实时框架,集成运动建模和剂量重建,以准确地管理治疗期间患者的不规则运动,提高适应性治疗的精度.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 图像指导疗法是指导图像的疗法.
背景情况:
- 在放射治疗期间患者的不规则运动会影响治疗的准确性.
- 适应性治疗需要精确的实时剂量计监测.
- 目前的方法通常依赖于更大的安全边际或离线适应.
研究的目的:
- 开发和验证碳离子治疗的实时,运动适应性框架.
- 为了能够在治疗期间持续评估递送的四维 (4D) 剂量.
- 为了促进适应性放射治疗的内部和分数间的剂量测量监测.
主要方法:
- 在碳离子疗法中开发了一个基于GPU的算法,用于实时4D剂量重建.
- 该框架将由代理追踪驱动的运动建模与治疗验证系统集成在一起.
- 验证涉及具有不规则运动的肺幻体,将输送的剂量与测量结果进行比较.
主要成果:
- 该框架生成了实时CT图像,与地面真相高度一致.
- 剂量重建在溢出间的时间内完成,允许快速评估.
- 平均99%的马指数合格率 (3%/3毫米) 证实了高精度.
结论:
- 这是碳离子治疗的第一个实时框架,集成了运动建模和剂量重建.
- 该系统在临床环境中有效处理不规则运动.
- 该框架为先进的自适应性碳离子疗法提供了基础.
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