1. From the Departments of Radiology (Q.L., X.G., Z.Y., X.F., H.H.) and Neurology (L.Y., X.C.), Huashan Hospital, Fudan University, Shanghai, China; Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China (J.X., P.G.); Department of Radiology, The First Affiliated Hospital, Wenzhou Medical University, China (W.C., Y.Y.).