Huipan Liu1,2, Wei Zhang1,2, Yue Chen3,4. 1. Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China. 2. Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Luzhou, Sichuan, PR China. 3. Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China. chenyue5523@126.com. 4. Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Luzhou, Sichuan, PR China. chenyue5523@126.com.