对比不同的提升概念和光束配置,用于胰腺癌的质子疗法
Taiki Takaoka1, Takeshi Yanagi2, Shinsei Takahashi2
1Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
Physics and imaging in radiation oncology
|May 7, 2024
概括
胰腺癌的质子疗法显示,由于断片间变化,目标覆盖率降低. 带有三条光束的场内射线 (FIF) 提供了最佳的目标覆盖和器官节省.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 在瘤学瘤学.
背景情况:
- 胰腺癌质子疗法的间断变化会影响治疗的准确性.
- 调查先进的技术,如现场在现场 (FIF) 和同时集成提升 (SIB) 是至关重要的.
研究的目的:
- 评估FIF和SIB技术在胰腺癌的扫描质子疗法中具有不同光束配置的有效性.
- 评估分数间差异对目标覆盖率和危险器官 (OAR) 剂量的影响.
主要方法:
- 15名患者通过使用FIF和SIB使用2,3,或4束强大优化的治疗计划进行了治疗.
- 在治疗期间获得的验证CT (vCT) 上进行了剂量重新计算.
- 评估的参数包括目标体积覆盖率 (V100%,D95%) 和OAR剂量 (胃,十二指肠D2cm3).
- 稳定性评估考虑了范围不确定性 (3.5%).
主要成果:
- 目标覆盖率 (IGTV V100%,D95%) 在所有技术的vCT上显著下降 (p < 0.001).
- FIF (2-3束) 和SIB (2束) 显示了IGTV的最高覆盖率.
- 强度分析显示,FIF和SIB的胃剂量增加了2个束,十二指肠剂量增加了4个束.
结论:
- 目标覆盖率随着胰腺癌质子疗法的分数间变化而减少.
- 使用三条光束的FIF技术提供了目标覆盖和正常组织节约的最佳平衡.
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