Sisi Shen1, Yao Tang2, Ruiyi Yang3,4, Dong Zhou1. 1. Department of Neurology, West China Hospital, Sichuan University, Chengdu, China. 2. Department of Neurology, Cheng Du Shang Jin Nan Fu Hospital, Chengdu, China. 3. Department of Radiology, West China Hospital, Sichuan University, Chengdu, China. 4. Department of Radiology, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.