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
Analysis of stability evaluation of output dose of linear accelerator VitalBeam based on machine performance check
王建林 1张天 1张文君 1胡强1
作者信息
- 1. 首都医科大学附属北京朝阳医院放疗科 北京 100020
- 折叠
摘要
基于机械性能检测(MPC)系统,分析医用直线加速器VitalBeam输出剂量的长期稳定性.采集2021年1月至2023年12月北京朝阳医院VitalBeam型医用直线加速器的500组日常自检数据,分析其剂量输出偏差的改变趋势和稳定性状态.通过MPC检测和数据分析,6 MV X射线的射线剂量输出变化为(0.53±0.85)%,射线均匀度变化为(0.54±0.15)%,射线中心偏移变化为(0.15±0.07)mm,均在误差允许的范围内,该医用直线加速器6 MV光子束剂量输出稳定可靠,满足临床治疗需要,MPC检测可用于加速器的日检质量控制.
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.
关键词
加速器/机械性能检测/6MV光子线/输出剂量/质量控制(QC)Key words
Accelerator/Mechanical performance check(MPC)/6 MV photon line/Output dose/Quality control(QC)引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据