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目的调查和分析广州市医用诊断X射线机的影像质量状况。方法用进口非介入式X射线QA仪和检测板现场检测。结果在322台诊断X射线机中,合格率为78.9%,其中国产机检测合格率仅为64.5%,而进口机检测合格率达88.9%。按机器类型分析,拍片透视机、胃肠机和DSA机一次检测合格率分别为76.3%、84.0%和100%。检测不合格集中在管电压的偏离和曝光时间的偏离两项指标。公立大型医院的X光机质量状况明显好于基层医疗机构和民营医疗机构。数字摄片机的影像质量指标明显优于普通摄片机,进口机优于国产机。结论医用诊断X射线机影像质量检测合格率偏低,很有必要对新安装及在用的医用诊断X射线机加强影像质量控制检测。
Objective To investigate and analyze the image quality of medical diagnostic X-ray machines in Guangzhou. Methods imported non-invasive X-ray QA instrument and test board on-site testing. The results of the 322 sets of diagnostic X-ray machine, with a pass rate of 78.9%, of which the domestic machine test pass rate was only 64.5%, while the import machine test pass rate of 88.9%. According to the analysis of machine type, the pass rates of film-making fluoroscope, gastrointestinal machine and DSA machine were 76.3%, 84.0% and 100% respectively. Detection of unqualified focus on the tube voltage deviation and exposure time deviate from two indicators. X-ray quality of public hospitals was significantly better than the basic medical institutions and private medical institutions. Digital video camera image quality indicators significantly better than ordinary video cameras, imported machines superior to domestic machines. Conclusion The pass rate of medical diagnostic X-ray image quality inspection is low, so it is necessary to strengthen the image quality control testing for newly installed and used medical diagnostic X-ray machines.