西门子Symbia T16 SPECT/CT核医学探头质量控制探讨  

Quality Control of Siemens Symbia T16 SPECT/CT Detectors

作　　者：何正中 廖光星 李宁[1] 唐红军 付巍[2] 杨鸿宇[1] 姚忠强[1] 肖国有[1] 李党生[1] HE Zhengzhong;LIAO Guangxing;LI Ning;TANG Hongjun;FU Wei;YANG Hongyu;YAO Zhongqiang;XIAO Guoyou;LI Dangsheng(Department of Nuclear Medicine,The Affiliated Tumor Hospital of Guangxi Medical University,Nanning Guangxi 530021,China;Department of Nuclear Medicine,Affliated Hospital of Guilin Medical University,Guilin Guangxi 541001,China)

机构地区：[1]广西医科大学附属肿瘤医院核医学科,广西南宁530021 [2]桂林医学院附属医院核医学科,广西桂林541001

出　　处：《中国医疗设备》2018年第10期45-48,共4页China Medical Devices

基　　金：广西医疗卫生适宜技术开发与推广应用项目(S201633);广西医药卫生自筹经费计划课题(Z2016472;Z2016498;Z20170436);广西教育厅2016年中青年教师基础能力提升项目(KY2016LX025);2016年度广西高等教育本科教学改革工程立项项目(2016JGB186)

摘　　要：目的探讨西门子Symbia T16 SPECT/CT的日常质量控制方法。方法基于西门子Symbia T16 SPECT/CT核医学探头的日常质控部分数据,分析核医学探头使用运行中的PPM活性计数值、固有均匀性和旋转中心等基本情况。结果 PPM活性计数值在1个工作日内观测数值主要分布于0.3~1.1 Kcount/s,从8:00至17:00活性计数值呈上升趋势;在1个工作周内PPM活性计数值先呈上升后下降趋势,检查病人数量多时当天PPM活性计数值较高。探头1、探头2固有均匀性测试数值(%)分别为(CFOV:2.49±0.66,UFOV:3.77±0.99),(CFOV:1.77±0.10,UFOV:2.18±0.17)。探头2固有均匀性优于探头1,探头固有均匀性性能经过校正得到一定程度改善。旋转中心探头1、探头2(180o、90o、76o)测试数值(mm)分别为:0.116、-1.030;5.059、-5.417;4.430、5.000。结论结果显示该SPECT/CT核医学探头的性能稳定良好,各项测试数值均符合厂家标准。定期行设备质控,特别是PPM活性计数监测和固有均匀性测试,能够及时发现和解决机房放射性污染、部分设备故障等问题,保证探头工作在最佳状态。Objective To analyze the measure of daily quality control （QC） of the Siemens Symbia T16 SPECT/CT detectors. Methods Based on part data of daily QC for the Siemens Symbia T16 SPECT/CT, the nuclear detector’s PPM count rate, intrinsic uniformity and center of rotation during working time were analyzed. Results The PPM counts rate distributed mainly in 0.3-1.1 Kcount/s within a day shift, which showed an up-trend from 8：00 to 17：00. Within a week shift, it showed an up-trend frst and down-trend late, the maximum counts occurred at the most examinations. The intrinsic uniformity （%） values of the detector 1 and detector 2 were CFOV： 2.49±0.66, UFOV： 3.77±0.99; CFOV： 1.77±0.10, UFOV： 2.18±0.17; respectively. The performance of detector 2 was better than the detector 1, and the intrinsic uniformity property of the detectors was improved after calibration. Center of rotation values （mm） of the detector 1 and detector 2 （180°, 90°, 76°） were 0.116, -1.030; 5.059, -5.417; 4.430, 5.000; respectively. Conclusion The results displayed that the nuclear detectors of the SPECT/CT were stable and effective, all the test data were in accordance with the manufacturer standard. Regular equipment quality control, especially PPM counts rate observation and intrinsic uniformity calibration, could found and solve the problems of radioactivity pollutant and some equipment faults in time, and maintain the nuclear detectors in the best state.

关 键 词：SPECT 核医学 核医学探头 质量控制 固有均匀性 

分 类 号：R318.6[医药卫生—生物医学工程] R445[医药卫生—基础医学]