运动补偿体积调制电弧放射治疗在磁共振直线加速器上的演示

IF 3.4 Q2 ONCOLOGY

Physics and Imaging in Radiation Oncology Pub Date : 2025-01-01 DOI:10.1016/j.phro.2025.100729

Pim T.S. Borman , Prescilla Uijtewaal , Jeffrey Snyder , Bryan Allen , Caiden K. Atienza , Peter Woodhead , Daniel E. Hyer , Bas W. Raaymakers , Martin F. Fast

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引用次数: 0

摘要

调强放疗（IMRT）结合磁共振成像（MRI）引导的门控传递代表了MR-linac治疗腹胸部肿瘤的最新进展。相比之下，体积调制电弧疗法（VMAT）由于其优越的输送效率和速度，通常用于传统的直线加速器。非劣等VMAT计划是在一个研究治疗计划系统中创建的，用于8名先前接受MR-linac治疗的肺癌患者。VMAT计划通过使用呼吸多叶准直器（MLC）跟踪的移动剂量计交付。与计划剂量相比，具有MLC跟踪的VMAT的平均2%/ 2mm局部伽马通过率为93%，递送效率为83%。

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Demonstration of motion-compensated volumetric modulated arc radiotherapy on an MR-linac

Intensity-modulated radiotherapy (IMRT) in combination with magnetic resonance imaging (MRI)-guided gated delivery represents the latest development in the treatment of abdominothoracic tumours on MR-linac. In contrast, volumetric-modulated arc therapy (VMAT) is typically used on conventional linacs due to its superior delivery efficiency and speed. Non-inferior VMAT plans were created in a research treatment planning system for eight lung cancer patients previously treated on an MR-linac. VMAT plans were delivered on a moving dosimeter using respiratory multi-leaf collimator (MLC) tracking. VMAT with MLC tracking achieved an average 2%/2 mm local gamma pass rate of 93% relative to planned dose with a delivery efficiency of 83%.

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来源期刊

Physics and Imaging in Radiation Oncology Physics and Astronomy-Radiation

CiteScore

5.30

自引率

18.90%

发文量

审稿时长

6 weeks