The case and thinking for signal interference in resolver of carousel on Varian VitalBeam medical linear accelerator

VernacularTitle:信号干扰VitalBeam加速器托盘旋转变压器的案例与思考
Author: Qingzhao ZHANG ¹ ; Yufeng YE ; Hanwei CHEN ; Lingxiang LIU
Author Information

1. 广州市番禺区中心医院肿瘤中心，广州　511400
Keywords: Carousel; Transverse (rotation) axis; Resolver; Encoder; 2036 interlock; Linear accelerator VitalBeam
From: Chinese Journal of Radiation Oncology 2022;31(11):1052-1054
CountryChina
Language:Chinese
Abstract: In this article, a case for random signal interference in resolver (or encoder) of carousel on Varian VitalBeam medical linear accelerator was illustrated. This case was considered as a rare failure of the technology platform (including TrueBeam) by Chinese, European and American technical experts in Varian. In this article, the differences of the carousel in the structure and control system between VitalBeam and traditional accelerator were comparatively analyzed to enable the peers to have a deeper understanding of resolver. The logic and methods to solve the fault were summarized, providing reference experience for analyzing the problems related to carousel. It is found that the interlocking system is imperfect, which provides a factual and technological basis for Varian to optimize the system.