Analysis of stability evaluation of output dose of linear accelerator VitalBeam based on machine performance check

VernacularTitle:基于机械性能检测分析VitalBeam型直线加速器输出剂量的稳定性评估及故障案例分析
Author: Jianlin WANG ¹ ; Tian ZHANG ; Wenjun ZHANG ; Qiang HU
Author Information

1. 首都医科大学附属北京朝阳医院放疗科北京 100020
Keywords: Accelerator; Mechanical performance check(MPC); 6 MV photon line; Output dose; Quality control(QC)
From: China Medical Equipment 2024;21(6):209-213
CountryChina
Language:Chinese
Abstract: To analyze the long-term stability of the output dose of the medical linear accelerator VitalBeam based on Mechanical Performance Check(MPC)system.500 daily self-test data of the medical linear accelerator VitalBeam from January 2021 to December 2023 were collected,and the change trend and stability status of dose output deviation were analyzed.Through MPC detection and data analysis,the 6MV X-Ray in radiation dose output change was(0.53±0.85)%,the ray uniformity change was(0.54±0.15)%,and the ray center offset change was(0.15±0.07)mm,all of which were within the allowable range of error.The 6 MV photon beam dose output of the medical linear accelerator is stable and reliable,which meets the needs of clinical treatment,and the MPC detection can be used for the daily inspection and quality control of the accelerator.