Brain stereotactic radiosurgery (SRS) treatments require multiple quality assurance (QA) procedures to ensure accurate and precise treatment delivery. As single-isocenter multitarget SRS treatments become more popular, the quantification of off-axis accuracy of the linear accelerator is crucial. In this study, a novel brain SRS integrated phantom was developed and validated to enable SRS QA with a single phantom to facilitate implementation of a frameless single-isocenter, multitarget SRS program. This phantom combines the independent verification of each positioning system, the Winston-Lutz, off-axis accuracy evaluation (i.e. off-axis Winston-Lutz), and the dosimetric accuracy utilizing both point dose measurements as well as film measurement, without moving the phantom. A novel 3D printed phantom, coined OneIso, was designed with a movable insert which can switch between the Winston-Lutz test target and dose measurement without moving the phantom itself. For dose verification,...

中文翻译：

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用于无框架单等距多目标立体定向放射外科手术的集成质量保证模型。

脑立体定向放射外科（SRS）治疗需要多种质量保证（QA）程序，以确保准确，准确地进行治疗。随着单等中心多目标SRS治疗变得越来越普遍，线性加速器离轴精度的量化至关重要。在这项研究中，开发并验证了新型的大脑SRS集成体模，以使具有单个体模的SRS QA能够促进无框架单等中心，多目标SRS程序的实施。该体模结合了每个定位系统的独立验证，Winston-Lutz，离轴精度评估（即离轴Winston-Lutz）以及利用点剂量测量和薄膜测量的剂量精度，而无需移动体模。一种新颖的3D打印体模，即OneIso，带有可移动插件的设计，该插件可以在Winston-Lutz测试目标和剂量测量之间切换，而无需移动体模本身。对于剂量验证，...