医用计算机断层摄影装置性能基准数据采集  

Data Collection of Performance Datum of Medical Computed Tomography

作　　者：严昂[1] 李琛伟 陈伟[2] 黄辉 罗晖[1] 曹扬[1] YAN Ang;LI Chenwei;CHEN Wei;HUANG Hui;LUO Hui;CAO Yanga(Department of Medical Equipment,Xiangya Hospital,Central South University,Changsha Hunan 410000,China;Department of Radiology,Xiangya Hospital,Central South University,Changsha Hunan 410000,China)

机构地区：[1]中南大学湘雅医院医学装备部,湖南长沙410000 [2]中南大学湘雅医院放射科,湖南长沙410000

出　　处：《中国医疗设备》2020年第4期20-22,32,共4页China Medical Devices

基　　金：国家重点研发计划(2018YFC2002400);湖南省卫生计生科研计划项目(C2019177)。

摘　　要：目的针对我院的新安装CT设备提出一种性能基准数据采集方法。方法使用美国模体实验室Catphan500 CT体模对我院2019年新安装CT设备的6项性能参数进行采集。结果获取新装机CT设备性能基准数据,其定位精度良好,运动精度在0.5 mm以内,5 mm和2.5 mm的层厚下空间分辨力均为7 Lp/mm,1%、0.5%和0.3%三种密度下能分辨出的孔径分别为3、5和5 mm,CT值线性1.9930×10^-4 cm^-1·HU^-1,CT值均匀性1.53。结论本方法适用于大部分厂家的CT设备机型。在新安装CT设备时,进行性能基准数据的采集能够为设备验收提供客观依据,同时能够为医院后续开展CT设备质控工作提供参照对比。Objective To propose a datum acquisition method of performance for newly installed CT equipment in our hospital.Methods Six performance parameters of the newly installed CT equipment in our hospital in 2019 were collected by using the Catphan500 CT phantom from American Model Laboratory.Results The performance datum of the newly installed CT equipment was obtained,with good positioning accuracy and motion accuracy iwithin 0.5 mm.The spatial resolution under the layer thickness of 5 mm and 2.5 mm was 7 Lp/mm.Under the three densities of 1%,0.5%and 0.3%,the aperture can be distinguished as 3,5 and 5 mm,respectively.The linear CT value was 1.9930×10^-4 cm^-1·HU^-1,and the CT uniformity was 1.53.Conclusion This method is applicable to CT equipment models of most manufacturers.When the new CT equipment is installed,the collection of performance datum can provide an objective basis for equipment acceptance,and can provide a reference for the follow-up CT equipment quality control in hospitals.

关 键 词：医用计算机断层扫描系统 质量控制 基准数据 CT体模 

分 类 号：R197.39[医药卫生—卫生事业管理]