320台CT设备性能和机房防护检测结果分析  

Analysis of 320 CTs'performance test and radiation protection test

作　　者：朱维杰 徐辉[2] 韩浚[3] 俞君[3] 陈娟[1] ZHU Weijie;XU Hui;HAN Jun;YU Jun;CHEN Juan(Peking University,School of Public Health,Beijing 100191 China;National Institute for Radiological Protection,China CDC;Beijing Center for Disease Prevention and Control)

机构地区：[1]北京大学医学部公共卫生学院,北京100191 [2]中国疾病预防控制中心辐射防护与核安全医学所 [3]北京市疾病预防控制中心北京市预防医学研究中心

出　　处：《中国辐射卫生》2019年第6期653-655,661,共4页Chinese Journal of Radiological Health

摘　　要：目的对北京市现有CT设备的性能和机房防护情况进行检测并进行分析,为进一步提高北京市CT设备性能和机房防护合格率,促进北京市CT设备合理配置提供参考。方法按照GB 17589—2011《X射线计算机断层摄影装置质量保证检测规范》规定的检查项目、要求及其检测方法,对北京市320台CT设备进行性能状态检测。按照GBZ 130—2013《医用X射线诊断放射防护要求》规定的要求和方法,对320台CT设备机房进行防护检测。检测结果采用SPSS 20.0软件进行统计分析。结果通过对320台CT设备性能和机房防护检测结果的统计分析,发现北京市CT设备性能检测合格率和机房防护检测合格率较高,均达到99.7%,CT设备中≥64排CT比例比以往明显提高。在进口CT和国产CT的两项重要指标对比中,进口CT在高对比分辨力(高对比算法)优于国产CT(P=0.03),而国产CT在低对比可探测能力上优于进口CT(P=0.03)。结论北京市CT设备性能和机房防护检测合格率均较高,归功于持续监测和不断推进新的监督措施,如开展“医用辐射监测网”和医院“稳定性检测”等,未来需继续推进相关工作。在CT设备配置优化上,可根据实际情况适当引入国产CT设备,并通过购置≥64排CT提高工作效率。Objective To detect and analyze the performance and protection quality control of CT equipment in Beijing,and provide reference for improving the performance and protection quality of CT equipment and promoting the reasonable allocation of CT equipment in Beijing.Methods 320 CT equipment in Beijing were detected for performance status and radiation level respectively according rules and standards in GB 17589—2011“Specifications for quality assurance test for computed tomography X-ray scanners”and GBZ 130—2013“Requirements for radiological protection in medical X-ray diagnosis”.SPSS 20.0 software was used for analysis.Results The testing results of 320 CT equipment's performance and protection quality showed that the qualified rate of performance test and protection test was both 99.7%,and the proportion of≥64 rows CT increased by years.The comparison between imported CT and domestic CT revealed that,the high contrast resolution(high contrast algorithm)of imported CT was better than domestic CT(P=0.03),while the low contrast detectability index of domestic CTwas better than imported CT(P=0.03).Conclusion The qualified rate of CT equipment's performance and protection quality in Beijing was high,which should be credited to the persistently monitoring and constantly updated measures,such as“constancy test”and“networks monitoring”.To optimize the CT equipment's allocation and improve the work efficiency,increasing the proportion of domestic CT and≥64 rows CT could be considered.

关 键 词：计算机断层摄影装置(CT) 质量控制检测 高对比分辨力 低对比可探测能力 

分 类 号：R144[医药卫生—公共卫生与预防医学]