Image Quality Comparison of Regularization and OSEM Iterative Reconstruction
in Digital PET/CT
TAO Duan1，PENG Weiai1，CHEN Jianglin2
1. Business Department of Advanced Molecular Imaging, Philips China Investment Co., Ltd., Beijing 100026, China丨
2. Department of Nuclear Medicine, Ping An Hao Yi Chongqing Medical Imaging Center, Chongqing 400042, China
Abstract：Objective Digital PET detector and regularized reconstruction algorithm are the innovations of PET/CT in hardware
and software algorithms. In order to study the changes in image quality of digital PET/CT with regularized reconstruction.
Methods Through the IEC model and the FDG uptake lesions, contrast recovery coefficient and relative signal-to-noise
ratio were calculated. Results After regularized reconstruction, the contrast recovery coefficient of the 10 mm sphere in the IEC
model was as high as 68%, and the relative signal-to-noise ratio of the FDG increased range was improved. The scatter plot was
drawn according to the improvement degree of the diameter of the increased range and the image quality, and the Pearson correlation
coefficient was -0.35. Conclusion Digital PET/CT regularized reconstruction improves the image quality. The smaller the diameter
of the lesion, the better the image quality.
陶端1，彭伟皑1，陈江林2. 数字化PET/CT正则化重建与有序子集迭代重建的图像质量比较[J]. 中国医疗设备, 2021, 36(9): 82-85.
TAO Duan1，PENG Weiai1，CHEN Jianglin2. Image Quality Comparison of Regularization and OSEM Iterative Reconstruction
in Digital PET/CT. China Medical Devices, 2021, 36(9): 82-85.
