Comparison of joint quality control and equivalence between two SPECT machines
YAO Shu-lin;DOU Huan-yu;WANG Xin-qiang;LIU Meng;CHEN Ying-mao;GAO Li-lei;CHEN Si;Department of Nuclear Medicine, Chinese PLA General Hospital;Department of Nuclear Medicine, Naval General Hospital;Department of Engineering Physics, Tsinghua University;
Objective To conduct a joint quality control between domestic dual-head variable-angle NET632 SPECT device and imported device to evaluate the application effectiveness. Methods The domestic NET632 SPECT was marked as the trial device, and the imported Philips Brightview XCT was marked as the comparative device. The same quality control methods were applied to the two devices for both pre-trial quality control and in-trial weekly quality control. The QC data were recorded and analyzed. Results Static images of a thyroid phantom and tomographic images of a complex performance phantom demonstrated nearly the same image quality. The images from both devices were within acceptable range. The noise and cold-region resolution of the trial devices were slightly worse while the hot-region resolution was slightly better than those of the comparative device. In the weekly QC procedures, slightly worse intrinsic spatial resolution and linearity, and better non-uniformity and energy resolution were observed on the trial device. All QC indices of both devices were within acceptable range. Conclusion The domestic dual-head NET632 SPECT has equivalent performances when compared with the imported device and is worthy applying clinically.