1. From the Department of Radiology, PLA General Hospital, Beijing, China (M.L., Y.C., J.C.); Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China (H.Q., D.L., X.Z.); and Department of Radiology, The Affiliated Hospital of Logistics University of Chinese People’s Armed Police Force, Tianjin, China (M.L., P.P.).