为多束光子FLASH强度调节辐射疗法开发概念验证治疗规划系统
Guo Chenlei1, Cui Weijie1, Zha Hao2
1Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Medical physics
|February 10, 2026
概括
这项研究介绍了FLASHPlan,FLASH放射治疗的治疗计划系统. 它证明了剂量分配的改善和风险器官暴露的减少,支持未来FLASH-RT的发展.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 计算生物学 计算生物学
背景情况:
- 闪光辐射疗法提供了因超高剂量率而减少正常组织损伤的潜力.
- 开发有效的治疗计划系统 (TPS) 对于推进FLASH技术至关重要.
- 多束光子FLASH (XFLASH) 疗法需要专门的规划策略.
研究的目的:
- 开发和评估FLASHPlan,一种用于多束XFLASH治疗的新型TPS.
- 整合先进的策略,如分数组合放射疗法 (FCRT),以优化剂量.
- 与传统规划相比,评估FCRT的剂量测量优势.
主要方法:
- FLASHPlan使用FCRT进行voxel级生物校正和生物有效剂量 (BED) 总和.
- FCRT涉及将光束角度分布在分数中,并进行分数间的门架调整.
- 五十个立体性身体放射疗法 (SBRT) 病例被重新规划并与传统计划进行比较.
主要成果:
- FCRT提高了计划合规性,减少了剂量泄漏,并增加了剂量下降.
- 处于危险的器官 (OARs) 显示高剂量暴露减少,达到100%的通过率限制.
- 在对剂量速率和生物参数的敏感性分析中,FCRT的剂量学优势被保留了.
结论:
- FLASHPlan为多束XFLASH提供了一个概念验证的TPS框架.
- 该系统将几何意识的FCRT交付与生物学意识的剂量评估相结合.
- 这项工作为未来的XFLASH系统开发和临床翻译奠定了基础.
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