快速的蒙特卡罗日志基础框架,用于在质子疗法中进行强大的4D剂量评估.
A Wochnik1, D Borys2,3, G Foltyńska1
1Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
Physics in medicine and biology
|July 2, 2025
概括
这项研究引入了用于质子治疗的快速4D蒙特卡洛 (MC) 剂量评估工具. 它解释了器官运动和分娩时间,揭示了在最坏的情况下目标覆盖率的显著减少.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 计算成像技术的成像
背景情况:
- 对于移动目标的质子疗法,特别是在中,需要先进的剂量测量评估.
- 目前的方法可能无法完全捕捉在自由呼吸治疗过程中器官运动的复杂性.
研究的目的:
- 开发和验证用于质子疗法的强大的4D蒙特卡洛 (MC) 剂量评估 (4DDE) 方法.
- 整合笔光束传递和器官运动的时间信息,以准确评估剂量.
- 评估呼吸运动对治疗计划稳健性的影响.
主要方法:
- 开发了一个专门的工具,将GPU加速的FRED MC代码与时间患者和分娩数据结合起来.
- 实施了标准的3D剂量评估,在呼吸阶段重新计算计划,以及强大的4DDE.
- 使用4DCT扫描从霍奇金淋巴瘤患者,采用可变形图像注册验证了方法.
主要成果:
- 与3D分析相比,强大的4DDE揭示了更广泛的剂量范围,这表明时间数据的重要性.
- 由于呼吸运动,Voxel-wise最糟糕的剂量分配显示了目标覆盖率的显著减少 (95%的异位剂量为47.4%,90%的异位剂量为20.8%).
- 马指数分析表明,3D和4D评估之间的差异.
结论:
- 开发的工具为质子辐射疗法中的4DDE提供了快速和多功能方法.
- 考虑到动态解剖变化对于确保强大的治疗计划评估至关重要.
- 这种方法提高了对移动目标的质子疗法的准确性.
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