当代SRS平台的基准测试:技术发展是否提高了治疗计划的质量?
Ian Paddick1, Judith Mott2, James Bedford3
1Queen Square Radiosurgery Centre, National Hospital for Neurology and Neurosurgery, London, United Kingdom.
Practical radiation oncology
|June 8, 2023
概括
新的立体射线手术 (SRS) 平台提供了更好的治疗质量. 网络刀和线性加速器提供更高的合规性,而低能耗系统实现更的剂量梯度,以提供精确的SRS.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 神经外科 神经外科
背景情况:
- 立体射线手术 (SRS) 输送系统已经大大进步.
- 之前的基准测试研究为性能比较提供了基准.
- 评估当代SRS平台对于优化治疗提供至关重要.
研究的目的:
- 评估当前SRS设备之间的性能差异.
- 为了比较现代SRS平台与旧代平台的功能.
主要方法:
- 评估的最先进的SRS平台包括:Gamma Knife Icon (GK),CyberKnife S7 (CK),Brainlab Elements,Varian TrueBeam,Varian Edge与HyperArc (HA) 以及Zap-X. 这些平台均为最先进的SRS平台.
- 利用了六个已建立的基准分析案例,并添加了14个目标案例来模拟增加的治疗复杂性.
- 性能指标的比较,包括目标覆盖率,符合性,剂量梯度,危险器官节省和治疗效率.
主要成果:
- 在所有平台上,平均目标覆盖率超过了98%.
- 网络刀 (CK) 显示了最高的帕迪克合规指数 (0.894),而玛刀 (GK) 显示了最的剂量梯度 (GI=3.52).
- 较低能量的平台 (GK,Zap-X) 实现了更的坡度,而更高能量的平台 (HA) 显示了更高的R50%值. C-臂线性加速器提供了最短的治疗时间.
结论:
- 与早期系统相比,当代SRS设备提供了更高质量的治疗.
- 网络刀和线性加速器平台在处理合规性方面表现出色.
- 低能量的SRS平台有利于实现的剂量梯度.
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