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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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一种适应性质子FLASH疗法,使用模块化针过器.

Ahmal Jawad Zafar1, Xiaofeng Yang1, Zachary Diamond1

  • 1Department of Radiation Oncology and Winship Cancer Institute, Emory University, Atlanta, Georgia, USA.

Medical physics
|September 12, 2025
PubMed
概括

这项研究引入了使用模块化针过器 (pRFs) 的自适应性质子FLASH疗法 (ADP-FLASH),以优化治疗计划. 该方法从最初的计划中回收组件,保持适应性质子质疗法的质量和临床目标.

关键词:
闪光疗法是一种闪光疗法.适应性质子疗法适应性质子疗法肝脏SBRT 肝脏SBRT 是一种峰过器是一种峰过器.

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科学领域:

  • 医学物理 医学物理
  • 辐射瘤学 辐射瘤学
  • 生物医学工程 生物医学工程

背景情况:

  • 开发了一个模块化针边过器 (pRF) 设计框架,用于快速制造定制过器,用于单能质子FLASH (快速,低剂量率) 规划.
  • 以前的工作重点是优化初始单能质子FLASH计划.

研究的目的:

  • 提出并验证一种使用模块化pRFs优化自适应性质子FLASH疗法 (ADP-FLASH) 的方法.
  • 从最初的计划中回收模块引脚,以减少在自适应FLASH规划中的pRF调整.

主要方法:

  • 从强度调节质子疗法 (IMPT) 计划中使用笔束方向 (PBD) 创建初始单能 (250 MeV) FLASH-pRF 计划.
  • 通过比较计划CT (pCT) 和重新成像CT (re-CT) 之间的点地图,将PBD分类为新/更改或不变.
  • 采用一个代最小平方回归模型来识别可回收的PBD,以最小的点监测单元 (MU) 权重变化,为适应性计划重新优化剩余的PBD.

主要成果:

  • 当将初始的pRF计划应用于重复CT扫描时,观察到计划质量下降 (V100) (例如,在一个案例中,从93.5%到60.2%).
  • ADP-FLASH-pRF方法恢复了与最初的pCT计划相比的计划质量 (例如,在重复CT时91.7%).
  • 在三个肝脏SBRT病例中回收了64.7%至91.2%的PBD,保持了临床目标和FLASH效应.

结论:

  • 在单能质子FLASH规划中验证了一种回收pRF的方法,用于SBRT.
  • ADP-FLASH框架为适应性质子疗法提供了一个可扩展和实用的解决方案,平衡有效性和效率.