符合线路SPECT设备质量控制及结果分析  

Quality control and analysis of results of SPECT equipment with coincidence circuit

作　　者：刘辉[1] 宋颖[1] 程金生[1] LIU Hui;SONG Ying;CHENG Jin-sheng(Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088

出　　处：《中国医学装备》2021年第12期6-9,共4页China Medical Equipment

基　　金：国家重点研发计划(2019YFC0121803)“创新医疗器械示范应用评价体系研究”。

摘　　要：目的:对符合线路单光子发射计算机体层摄影(SPECT)设备进行性能测试,探讨符合线路SPECT质量控制的重要性。方法:参考美国电气制造商协会(NEMA)NU1-2012标准、国家卫生行业标准(WS523-2019)以及厂家规范,测量我国广东、湖南、广西、黑龙江和安徽等省的17台符合线路SPECT设备的断层空间分辨力、系统平面灵敏度、系统空间分辨力、固有均匀性、固有最大计数率、固有空间分辨力和固有空间线性等性能指标。结果:所检测的17台符合线路SPECT设备断层空间分辨力为11.08~16.48 mm,平均(11.97±1.24)mm;系统平面灵敏度为69.89~107.30 s^(-1)·MBq^(-1),平均(80.46±10.72)s^(-1)·MBq^(-1);系统空间分辨力为5.52~8.72 mm,平均(7.83±0.74)mm;固有均匀性为2.17%~13.69%,平均(4.01±3.24)%;固有最大计数率为0.83~1.52×10^(5)s^(-1),平均(1.29±0.18)×10^(5)s^(-1);固有空间分辨力为4.31~4.89 mm,平均(4.66±0.15)mm;固有空间线性为0.11~0.94 mm,平均(0.30±0.22)mm。不合格的指标主要是固有均匀性和固有空间线性。结论:晶体为3/8英寸设备固有均匀性和固有空间线性的性能指标好于晶体为1英寸的符合线路SPECT设备,故更需要加强质量控制,提升临床诊断质量。Objective:To test the performance of single photon emission computed tomography(SPECT)equipment with coincidence circuit and explore the importance of the quality control of SPECT equipment with coincidence circuit.Methods:According to the NU1-2012 standard of National Electrical Manufacturers Association(NEMA),National Health Industry Standard(WS 523-2019)and manufacturer specification,the performance indicators,which included tomographic spatial resolution(TSR),system planar sensitivity(SPS),system spatial resolution(SSR),intrinsic uniformity(IU),intrinsic count rate performance(ICRP),intrinsic spatial resolution(ISR)and intrinsic spatial linearity(ISL),of 17 SPECT equipment with coincidence circuit of Guangdong,Hunan,Guangxi,Heilongjiang and Anhui provinces in China were measured.Results:The TSR range of 17 tested SPECT equipment with coincidence circuit was 11.08-16.48 and the mean was(11.97±1.24)mm,and the SPS range of them was 69.89-107.30s^(-1)·MBq^(-1) and the mean was(80.46±10.72)s^(-1)·MBq^(-1),and the SSR range of then was 5.52-8.72mm and the mean was(7.83±0.74)mm,and the IU range of them was 2.17-13.69%and the mean was(4.01±3.24)%,and the ICRP range of them was(0.83-1.52)×10^(5)s^(-1) and the mean was(1.29±0.18)×10^(5)s^(-1),and the ISR range of them was 4.31-4.89mm and the mean was(4.66±0.15)mm,and the ISL range of them was(0.11-0.94)mm and the mean was(0.30±0.22)mm.The unqualified indicators mainly included IU and ISL.Conclusion:The performance indicators of IU and ISL of SPECT equipment with coincidence circuit which crystal size is 3/8 inch are better than those which crystal size is 1 inch.Therefore,it more need to strengthen the quality control so as to improve the quality of clinical diagnosis.

关 键 词：单光子发射计算机体层摄影(SPECT) 符合线路 质量控制 空间分辨力 灵敏度 

分 类 号：R812[医药卫生—放射医学]