Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
Perelman Center for Advanced Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Med Phys. 2019 Oct;46(10):4304-4313. doi: 10.1002/mp.13723. Epub 2019 Aug 27.
This manuscript describes the experience of two institutions in commissioning the new Halcyon platform. Its purpose is to: (a) validate the pre-defined beam data, (b) compare relevant commissioning data acquired independently by two separate institutions, and (c) report on any significant differences in commissioning between the Halcyon linear accelerator and other medical linear accelerators.
Extensive beam measurements, testing of mechanical and imaging systems, including the multi-leaf collimator (MLC), were performed at the two institutions independently. The results were compared with published recommendations as well. When changes in standard practice were necessitated by the design of the new system, the efficacy of such changes was evaluated as compared to published approaches (guidelines or vendor documentation).
Given the proper choice of detectors, good agreement was found between the respective experimental data and the treatment planning system calculations, and between independent measurements by the two institutions. MLC testing, MV imaging, and mechanical system showed unique characteristics that are different from the traditional C-arm linacs. Although the same methodologies and physics equipment can generally be used for commissioning the Halcyon, some adaptation of previous practices and development of new methods were also necessary.
We have shown that the vendor pre-loaded data agree well with the independent measured ones during the commission process. This verifies that a data validation instead of a full-data commissioning process may be a more efficient approach for the Halcyon. Measurement results could be used as a reference for future Halcyon users.
本手稿描述了两个机构在委托新的 Halcyon 平台方面的经验。其目的是：(a)验证预定义的光束数据，(b)比较由两个独立机构独立获得的相关调试数据，以及(c)报告 Halcyon 线性加速器与其他医用线性加速器之间在调试方面的任何显著差异。
在两个机构独立进行了广泛的光束测量、机械和成像系统测试，包括多叶准直器 (MLC)。还将结果与已发表的建议进行了比较。当新系统的设计需要改变标准实践时，与已发表的方法（指南或供应商文档）相比，评估这些改变的效果。
由于探测器的正确选择，各自的实验数据与治疗计划系统计算之间以及两个机构的独立测量之间都发现了很好的一致性。MLC 测试、MV 成像和机械系统显示出与传统 C 臂直线加速器不同的独特特性。虽然通常可以使用相同的方法和物理设备来调试 Halcyon，但也需要对以前的实践进行一些调整并开发新方法。
我们已经表明，在调试过程中，供应商预加载的数据与独立测量的数据非常吻合。这验证了数据验证而不是全数据调试过程可能是 Halcyon 的一种更有效的方法。测量结果可作为未来 Halcyon 用户的参考。
