SPECT设备性能质量控制检测及结果分析

Performance quality control detection and result analysis of SPECT equipment

目的通过对四川省9台SPECT设备的性能检测,了解四川省SPECT设备性能现状,提高对SPECT设备影像的质量控制。方法使用SPECT性能检测模体和图像分析软件,按照国家相关标准和NEMA标准,进行系统平面灵敏度、系统空间分辨率、固有计数率特性、断层空间分辨率、固有空间分辨率、固有均匀性、固有空间微分线性等性能指标的检测。结果 7项性能指标中,固有均匀性和固有空间微分线性合格率较低,合格率仅为44.4%和33.3%,固有计数率特性与固有空间分辨率合格率为88.9%,其余各项指标合格率均为100%。结论使用人员应具有一定的日常维护技能和意识,建立设备的质量控制措施,强调对SPECT设备性能测试的重要性,以提高临床诊断质量。

Objective To understand the performance status of SPECT and improve the quality control of the SPECT by tes- ting 9 SPECT equipments in Sichuan province. Methods According to the relevant national and NEMA standards, using SPECT performance detection mode and image analysis code, the performance of the 9 SPECTs were measured including their tomographic spatial resolution, system planar sensitivity, system spatial resolution, intrinsic counting rate performance, intrin- sic spatial resolution, intrinsic spatial resolution, intrinsic uniformity, intrinsic spatial differential linear. Results In the 7 performance indicators, the intrinsic uniformity and the intrinsic spatial differential linear qualification rate are relatively low, the pass rate is only 44.4% and 33.3%, intrinsic counting rate performance and the intrinsic spatial resolution pass rate are 88.9% , and the other indexes pass rate are 100%. Conclusion Users should have some daily maintenance skills and aware- ness, take quality control measures for equipment, emphasize the importance of performance testing for SPECT devices, so as to improve the quality of clinical diagnosis.