Hao Liu1, Haiman Hou2, Jingliang Cheng3. 1. Department of MRI, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Dong Road, Zhengzhou, 450052, People's Republic China. liuhao19880326@163.com. 2. Department of Neurology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Dong Road, Zhengzhou, 450052, People's Republic China. 3. Department of MRI, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe Dong Road, Zhengzhou, 450052, People's Republic China.