Abstract

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Author(s):: LING Wenjia; LIN Xiaoqin; GONG Wanling; CHEN Manshan; Department of Medical Equipment, Guangdong Provincial Peoples Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510080, China

Abstract:: Abstract: Objective To popularize the PET performance testing method and promote quality control through the analysis on the basic structure and principle of PET subsystem in uEXPLORER PET-CT machine and the performance test of PET machine according to NEMA standards. Methods According to the NEMA standard and the performance requirements of the factory, the equipment was tested for spatial resolution, sensitivity, scattering fraction and equivalent noise count rate, and the obtained results were evaluated. Results The NEMA spatial resolution at 1 cm from the center of the field was 3.10 mm in transverse direction and 3.28 mm in axial direction, and that at 10 cm from the center of the field was 3.48 mm in radial direction on transverse section, 3.24 mm in tangential direction on transverse section, and 3.49 mm in axial direction.The results of NEMA sensitivity test at 0 and 10 cm from FOV center were 174.279 kcps/MBq and 180.261 kcps/MBq. The NEMA scattering fraction was 36.7%, and the equivalent noise count rate was 1 569.5 kcps. Conclusion The results of NEMA standard-based performance test for uEXPLORER PET-CT machine PET subsystem conform to the requirements of the standard. The testing method with simple operation and reasonable process has a high operability, and it is conducive to the promotion of quality control.