山西省部分医疗机构医用X射线诊断设备影像质量控制检测结果分析

Analysis of testing results of image quality control in medical X-ray diagnostic equipment of some medical institutions in Shanxi Province

目的了解山西省医疗机构医用X射线诊断设备影像质量控制状况。方法依据国家相关标准,采用X射线机多功能质量检测仪及性能检测工具,对山西省部分医疗机构医用X射线诊断设备进行质量控制检测。结果医用X射线摄影设备检测项目中单项合格率,除输出量线性94.4%、曝光时间指示的偏离98.6%,有用线束垂直度的偏离95.8%,光野与照射野四边的偏离和光野与照射野中心的偏离分别为77.5%、85.9%,其余检测项目合格率为100%。透视设备除入射体表空气比释动能率典型值合格率为96.7%,其余检测项目合格率为100%。医用X射线诊断设备合格率在不同所管辖机构级别组之间总的来讲差异有显著性(P<0.05);组间两两比较:省管组与市管组比较、市管组与区县组比较,设备合格率差异无显著性(P>0.0125),省管组与区县组比较,设备合格率差异有显著性(P<0.0125)。产地不同(进口组与国产组),设备合格率差异无统计学意义(P>0.05)。结论定期的医用X射线影像质量控制检测十分必要。

Objective To understand medical X - ray diagnostic equipment image quality control status of the medical insti- tutions in Shanxi Province. Methods According to the relevant national standards, the multi - functional quality detector with X - ray machine and performance testing tools were used to test the quality control of the medical X - ray diagnostic equipment in some medical institutions in Shanxi Province. Results All single qualified rates in medical X - ray radiography equipment test items were 100% , except 94.4% of linearity of output, 98.6% of deviation from exposure time indication, 95.8% of de- viation from the verticality of useful beams , 77.5%, 85.9% of deviation from four sides and from center between light field and exposure field All single qualified rates in the fluoroscopy equipment test items were 100% , in addition to the 96.7% of the typical value of air kerma rate on the incident surface. Medical X - ray diagnostic equipment qualified rate in different groups under the jurisdiction of the level of difference was statistically significant in overall （ P 〈 0.05 ） ; comparison between the two groups： the provincial administrative group and the municipal administrative group, the municipal administrative group and the county administrative group ,there was no significant difference in equipment qualification rates （P 〉0. 0125 ）. But there was significant difference between the provincial administrative group and the county administrative group （ P 〈 0. 0125 ）. In addition, there was no significant difference in qualification rate between the import group and the domestic group （ P 〉 0.05 ）. Conclusion Regular medical X - ray image quality control testing is necessary.