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在MR-linac上演示运动补偿体积调制弧射疗法

Pim T S Borman¹, Prescilla Uijtewaal¹, Jeffrey Snyder^2,3

¹Department of Radiotherapy, University Medical Center Utrecht, Utrecht, The Netherlands.

Physics and imaging in radiation oncology

|March 6, 2025

概括

使用多叶合仪 (MLC) 追踪的体积调制弧线疗法 (VMAT) 显示了与强度调制放射治疗 (IMRT) 治疗MR-linacs肺癌的计划质量相似的结果. 这种先进的技术为腹腔胸部瘤提供了高效的输送.

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:

强度调节放射疗法 (IMRT) 带有磁共振成像 (MRI) 引导的门隔输送是对MR-linacs的腹腔胸部瘤的最新方法.
卷度调制弧线疗法 (VMAT) 由于其速度和效率,通常用于传统的线路.

研究的目的:

评估VMAT的可行性和计划质量,用于跟踪先前接受MR-linac治疗的肺癌患者的多叶合仪 (MLC).
将VMAT交付效率与基于MR-linac的IMRT进行比较.

主要方法:

在研究治疗计划系统中,为八名肺癌患者生成了非劣质的VMAT计划.
在移动剂量计上交付了VMAT计划,其中包括呼吸道MLC跟踪.
使用2%/2毫米局部马分析评估了计划质量.

主要成果:

使用MLC跟踪的VMAT与计划剂量相比,实现了平均93%的局部马传递率 (2%/2毫米).
使用MLC跟踪的VMAT的交付效率为83%.
结果表明,与基于MR-linac的治疗方法相比,计划质量并不劣.

结论:

具有呼吸道MLC跟踪的VMAT是MR-linacs肺癌治疗的可行替代方案,提供可比的计划质量.
这种技术表现出高的输送效率,有可能改善腹腔胸部瘤的治疗吞吐量.

关键词:

肺癌是一种肺癌.在 MLC 追踪中使用 MLC 追踪.这就是MR-linac.这就是为什么VMAT VMAT.

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Magnetic Resonance Imaging

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