1Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, People’s Republic of China; 2Department of Nuclear Medicine, Daping Hospital, Army Medical University, Chongqing, People’s Republic of China; 3Department of Gastroenterology, People’s Hospital of Chongqing Hechuan, Chongqing, People’s Republic of China; 4Department of Medical Engineering, Xinqiao Hospital, Army Medical University, Chongqing, People’s Republic of China; 5College of Biomedical Engineering and Imaging Medicine, Army Medical University, Chongqing, People’s Republic of China; 6De...