1. From the Department of Radiology, Renmin Hospital, Wuhan University, Hubei Zhang Road, Wuchang District, 99 Jiefang Rd 238, Wuhan, Hubei 430060, China (L.H., Y.F.Z., L.W., L.L., D.X., W.G., J.W., Y.L., F.F.Z.); and Department of Biological Engineering, School of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China (X.S.L.).