1. Radiology Department, Shaanxi Normal University Hospital, Xi’an, Shaanxi 710062, China
2. Radiophysics Department, Qingdao Central Hospital, Qingdao, Shandong 266042, China
3. Radiology Department, Yan’an Hospital of Kunming City, Kunming, Yunnan 650051, China
4. Molecular Imaging Department, Qingdao Central Hospital, Qingdao, Shandong 266042, China