Objective:To study a quality control method of digital single photon emission computed tomography for heart,so as to provide references for formulating a standards of quality control(QC)of digital SPECT equipment.Methods:Based on the American Electrical Manufacturers Association(AEMA)"Gamma Camera Performance Test"(NU 1-2018)and the test method of routine quality assurance of equipment that was performed by related manufacturers of digital SPECT equipment for heart,a general QC method was constructed,which suited to the digital SPECT equipment for heart that used semiconductor cadmium zinc telluride(CZT)material,and turned prober on multi-angle in scanning.The test content included 5 test items,such as system energy resolution,system uniformity,sensitivity of system scanning,tomographic spatial resolution with scattering and maximum count rate of system.Results:Compared with the manufacturer's requirements,the test results indicated that the test results of the first time of 5 items included system energy resolution,system uniformity,sensitivity of system scanning,tomographic spatial resolution with scattering and maximum count rate of system were respectively 5.8%,8%,67 811 counts/(min·MBq),4.91mm,1.8×106s-1.The test results of the second time of them were respectively 5.6%,6%,68 297 counts/(min·MBq),4.96mm and 1.8×106s-1.The results of all test items met the requirements of the manufacturer's indicators.Conclusion:The established QC method can scientifically and objectively evaluate the operating state of this kind of equipment,which can provide data support for formulating QC standard of digital SPECT equipment.
Cadmium zinc tellurium(CZT)Single Photon Emission Computed Tomography(SPECT)Quality control(QC)HeartSystem energy resolution
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万方数据
