强度调节的质子疗法和基于光子的放射治疗对骨底部瘤的剂量比较
Yuanyuan Wang1,2,3, Jiajun Zheng4, Lei Liu1
1Hefei Ion Medical Center, the First Affıliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
Journal of applied clinical medical physics
|October 14, 2025
概括
强度调节质子疗法 (IMPT) 提供了与VMAT/IMRT对骨底部瘤的目标覆盖率相似的覆盖率. IMPT显著节省了处于危险的器官,证明了它对复杂病例的临床潜力.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 神经外科 神经外科
背景情况:
- 头骨底部瘤由于靠近关键器官而存在复杂的治疗挑战.
- 像VMAT/IMRT这样的基于光子的辐射疗法技术在保护有风险的器官 (OARs) 方面存在局限性.
- 强度调节质子疗法 (IMPT) 提供了改善剂量分配和节省OAR的潜力.
研究的目的:
- 为了比较IMPT和VMAT/IMRT之间的剂量测量差异,用于骨底部瘤.
- 为了评估IMPT与光子治疗中的目标覆盖率和OAR节省.
- 评估IMPT在复杂的头骨底部瘤治疗中的临床实用性.
主要方法:
- 对头骨底部瘤患者的IMPT和VMAT/IMRT计划的剂量比较.
- 利用了Eclipse TPS,对质子计划进行了强大的优化.
- 对目标体积和OAR (脑干,脊髓,视觉通路等) 的分析剂量指标 (D2%,Dmean,CI,HI) ) 的情况.
- 使用威尔科克森签名等级测试进行统计分析 (p<0.05).
主要成果:
- 在IMPT和光子计划之间,目标覆盖率相当于 (p=0.12).
- IMPT显示,对脑干,脊髓,眼镜,眼睛和右侧腺进行了统计学上显著的剂量减少.
- 大脑干D2%从45.70Gy (光子) 减少到39.47Gy (质子) (p=0.037).
- 观察到其他OARs的剂量减少29%-83%,在单个情况下对左侧侧和视觉通路显著节省.
结论:
- 对于骨底部瘤,IMPT的目标覆盖率与VMAT/IMRT的目标覆盖率相当.
- 与光子疗法相比,IMPT提供了几个关键OAR的优越节省.
- 这些发现支持IMPT的临床潜力,用于治疗复杂的头骨底部瘤,优先保护正常组织.
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