使用4mm锥形准直器的6 MV无压平滤波和6 MV立体定向放射治疗三叉神经痛的剂量学比较

Pub Date : 2018-09-30 DOI:10.14407/JRPR.2018.43.3.107

V. Mhatre, P. Chadha, Abhaya P Kumar, K. Talapatra

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引用次数: 1

摘要

材料和方法:回顾性研究了5例TN患者，这些患者之前曾在我机构使用基于框架的、基于linac的立体定向放射手术(SRS)在Novalis Tx上治疗，使用6 MV SRS光束，在Edge直线加速器上重新规划6X FFF光束，使用相同的光束角度和剂量限制，使用4 mm锥形准直器。通过在LINAC的QA模式下重新交付计划，比较Edge和Novalis Tx的监视器单元总数和光束准时率，以比较交付效率。采用均匀性指数(HI)和帕迪克梯度指数(GI)评价各方案的质量。我们还分析了脑干和危险器官(OARs)的剂量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dosimetric Comparison of 6 MV Flattening Filter Free and 6 MV Stereotactic Radiosurgery Beam Using 4 mm Conical Collimator for Trigeminal Neuralgia Radiosurgery

Materials and Methods: A retrospective study was conducted for 5 TN patients who had been previously treated at our institution using frame-based, LINAC-based stereotactic radiosurgery (SRS) on Novalis Tx using 6 MV SRS beam were replanned on 6X FFF beams on Edge Linear accelerator with same beam angles and dose constraints using 4 mm conical collimator. The total number of monitor units along with the beam on time was compared for both Edge and Novalis Tx by redelivering the plans in QA mode of LINAC to compare the delivery efficiency. Plan quality was evaluated by homogeneity index (HI) and Paddick gradient index (GI) for each plan. We also analyzed the doses to brainstem and organ at risks (OARs).

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