适应需求:针对局部晚期肺癌的个性化适应性辐射治疗的新策略
Ruiqi Li1, Tingliang Zhuang1, Steven Montalvo1
1Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, Texas.
Practical radiation oncology
|April 5, 2024
概括
这项研究表明,适应性按需 (AOD) 工作流程用于肺癌放射治疗是有效的,并改善了目标覆盖率和器官节省. 每周在线适应性辐射疗法 (o-ART) 有效地管理治疗期间的解剖变化.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
背景情况:
- 肺癌放射治疗期间的解剖学变化需要适应性规划.
- 线下自适应方法已经证明了好处,但耗时.
研究的目的:
- 介绍和分析一种新的适应性按需 (AOD) 工作流程,用于局部晚期肺癌 (LALC).
- 结合在线自适应性辐射疗法 (o-ART) 与图像引导的输送,以实现高效的治疗适应.
主要方法:
- 分析了26名用AOD工作流程治疗的LALC患者,每周进行调整.
- 为提高效率而定时的工作流段,并对目标覆盖率和OAR剂量的适应性与非适应性计划进行了比较.
- 通过评估在适应性计划中预先规划目标的实现来评估规划的稳定性.
主要成果:
- 对于大多数分数,AOD工作流程在30分钟内完成.
- 在治疗期间,观察到内部目标体积 (ITV) 平均减少 26.6%.
- 与非适应性计划相比,o-ART提高了ITV和计划目标量 (PTV) 覆盖率,分别为2.9%和6.8%.
- 对于>10%的瘤生长,PTV覆盖率通过o-ART提高了17.2%.
- 适应性计划中的94.1%满足了关键的OAR限制,而非适应性计划中的81.9%,减少了对心脏,食道和肺的剂量.
结论:
- 在LALC放射治疗中,AOD工作流是有效和强大的,用于管理LALC放射治疗中的解剖变化.
- 每周适应足以保持治疗准确度.
- 这种AOD工作流提供了剂量测量优势,是传统重新规划的可行替代方案.
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