Kaibin Shi1,2, Junlin Shen1,2, Xuanye Yue1,2. 1. Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China. 2. Department of Radiology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.