一种通用型SPECT性能检测系统的验证研究—系统性能部分

摘要

目的:检验一种单光子发射断层显像系统(SPECT)质量控制通用模体套装及SPECT质量控制通用检测系统的可靠性.方法:使用SPECT质量控制通用检测系统和通用模体套装对两个厂商的3台SPECT设备的主要系统性能进行测试(自测),并与厂商专用模体及软件的测试结果(厂测)进行对比.结果:①系统平面灵敏度,3台设备的自测和厂测结果一致性很好,相对偏差在0.2%以下;②系统空间分辨力,3台设备的自测和厂测结果一致性很好,相对偏差在0.2%以下;③断层空间分辨力,3台设备的自测和厂测结果一致性很好,相对偏差在5%以下;④全身空间分辨力,3台设备的自测和厂测结果一致性很好,相对偏差在0.2%以下.结论:SPECT质量控制通用模体套装及SPECT质量控制通用检测系统可靠,测试结果准确.%Objective:To test the reliabilities of general software and phantom suite of single-photon emission computed tomography (SPECT) quality control and the general testing system of SPECT quality control.Methods: The main system performances of 3 SPECT equipments from 2 manufacturers were tested by using general testing system of SPECT quality control and general QC software and phantom suite(self-test). And then to compare these results with those results of special software and phantom suite from manufacturers(manufacturer-test). Results: (1)System planar sensitivity: There was a very good consistence between the self-test and the manufacturer-test for the three SPECT equipments, and the relative deviations between the self-test and the manufacturer-test for all of them were below 0.2%. (2)System spatial resolution: There was a very good consistence between the self-test and the manufacturer-test for the three SPECT equipments, and the relative deviations of them also were below 0.2%. (3)Tomography spatial resolution: There was a very good consistence between the self-test and the manufacturer-test for the three SPECT equipments, and the relative deviations of them were below 5%. (4)Spatial resolution for whole body: There was a very good consistence between the self-test and the manufacturer-test for the three SPECT equipments, and the relative deviations of them were below 0.2%.Conclusion:The general software and phantom suite of SPECT quality control and the general testing system of SPECT quality control are reliable and the testing results are accuracy.