MSCT成像系统的质量控制检测与质量管理  

Test of Quality Control and Quality Management of MSCT System

作　　者：叶培筠 梁永刚 陈佳敏 陈楚洁 付丽媛 YE Peiyun;LIANG Yonggang;CHEN Jiamin;CHEN Chujie;FU Liyuan(Department of Radiology,Fuzong Teaching Hospital,Fujian University of Traditional Chinese Medicine,Fuzhou Fujian 350025,China;Department of Radiology,The 900th Hospital of Joint Logistics Support Force,Fuzhou Fujian 350025,China)

机构地区：[1]福建中医药大学福总教学医院放射诊断科,福建福州350025 [2]联勤保障部队第900医院放射诊断科,福建福州350025

出　　处：《中国医疗设备》2022年第8期147-150,共4页China Medical Devices

基　　金：福建省科技计划项目(2021I0037);医院科研计划(2019Q02)。

摘　　要：目的对多层螺旋CT(Multi-Slice Spiral CT,MSCT)设备进行质量控制检测,探讨MSCT设备的质量控制检测方法,以保障各项参数的准确性和CT设备的良好运行。方法采用Barracuda多功能X射线参数测试仪、Catphan500 CT性能测试体模、CT剂量头模、DCT10 CT长杆电离室及CT设备自带水模对CT设备的检查床运动精度、加权CT剂量指数(Weighted CT Dosimetry Index,CTDIw)、定位光精度、CT值线性、层厚偏差、空间分辨率、低对比度分辨率、CT值(水)、均匀性和噪声进行检测并计算检测结果。结果检查床运动精度测量的误差为0,CTDIw为45.9 mGy,定位光精度测量误差为0.5 mm,CT值线性为-31 HU,层厚偏差为0.409,标准算法和高分辨算法的空间分辨率分别为7和11Lp/cm,低对比度分辨率为3 mm,CT值(水)为2.1 HU,均匀性为1.4 HU,噪声为0.35%。结论通过对MSCT设备进行定期质量检测,可实时掌握设备工作状态,确保参数科学、准确,保障设备安全有效运行。Objective To carry out the quality control of multi-slice Spiral CT(MSCT)equipment,and the quality control method of MSCT equipment was discussed in order to ensure the accuracy of various parameters and the good operation of CT equipment.Methods Barracuda multi-functional X-ray parameter equipment,Catphan 500 CT performance test phantom,CT dose head model,DCT10 CT long rod ionization chamber and CT equipment water model were used to detect the accuracy of diagnostic couch motion,CTDIW,accuracy of positioning light,linearity of CT value,deviation of layer thickness,spatial resolution,low contrast resolution,CT value,uniformity and noise of CT equipment,and the results were calculated.Results The deviation of diagnostic couch motion was 0 mm,CTDIW was 45.9 mGy,the deviation of positioning light was 0.5 mm,the linearity of CT value was-31 HU,the deviation of layer thickness was 0.409,the spatial resolution of standard algorithm and high-resolution algorithm were 7 and 11 LP/cm respectively,low contrast resolution was 3 mm,CT value(water)was 2.1 HU,the uniformity was 1.4 HU,and the noise was 0.35%.Conclusion Through regular quality testing of MSCT equipment,the working status of equipment can be mastered in real time to ensure scientific,accurate parameters,safe and effective operation of equipment.

关 键 词：多层螺旋CT成像系统 质量控制 性能检测 质量管理 

分 类 号：R197.39[医药卫生—卫生事业管理]