多机构对双层MLC的绩效评估
Andy Buckle1, Conor Heeney2, Matthew Jones3
1Oxford University Hospitals NHS Foundation Trust, Radiotherapy Physics, Churchill Hospital, Oxford, UK.
Journal of applied clinical medical physics
|October 30, 2025
概括
多机构的测试确定了Varian Halcyon和Ethos线性加速器 (linac) 多叶聚合器 (MLC) 系统的典型性能范围. 大多数性能指数与现有的Linac数据保持一致,在近接层校准中注意到的小例外.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 放射治疗技术 放射治疗技术
背景情况:
- 瓦里安哈尔基昂和埃索斯线性加速器 (linacs) 采用了一种新的双层多叶聚合器 (MLC).
- 了解这种新的MLC技术的性能特征对于放射治疗的质量保证至关重要.
研究的目的:
- 对Varian Halcyon和Ethos linacs的MLC性能进行多机构评估.
- 定义这些特定的 linac 模型的性能指数的典型范围.
主要方法:
- 运用了交付给大电压 (MV) 成像面板的图案,以便在多个中心进行可重现的测试.
- 采用自动化图像分析来推导MLC性能表征的指标.
- 包括测试,如围,MLC泄漏,扫除间隙,开放场面对称性,输出变化与门架角度,以及体积调制弧线疗法 (VMAT) 索引.
主要成果:
- 绩效指数测量了来自11所机构的16个领域的绩效指数.
- 发现大多数绩效指标与其他品牌的表现一致.
- 关于近接层位置校准,注意到了一个例外.
结论:
- 在Varian Halcyon和Ethos linacs.中为多叶合器建立了典型的性能指数范围.
- 为这些放射治疗设备的质量保证和性能评估提供了一个基准.
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