Analysis of performance test results of some medical linear accelerators in Hebei Province, China, 2019—2021 / 中国辐射卫生

ABSTRACT

@#<b>Objective</b> To investigate the current situation of quality control in medical linear accelerators in Hebei Province, China. <b>Methods</b> The main performance indices of some medical linear accelerators in Hebei Province, 2019—2021 were tested according to the current relevant effective standards GB 15213—2016 <i>Medical Electron Accelerators-Functional Performance Characteristics and Test Methods</i> and WS 674—2020 <i>Specification for Testing of Quality Control in Medical Linear Accelerator</i>. <b>Results</b> A total of 175 medical linear accelerators were tested from 2019 to 2021, and the annual pass rates were 72.4% in 2019, 75.9% in 2020, and 79.4% in 2021. The overall pass rate of initial inspection was 76.0%, and the pass rate of reinspection was 100.0%. The index with the lowest pass rate in the initial inspection was square X radiation field uniformity, followed by dose deviation and square X radiation field symmetry. <b>Conclusion</b> Medical institutions should strengthen quality control management, conduct regular testing of medical linear accelerators, and timely correct dose deviation, so as to ensure the treatment effect of patients.