1. Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China (Y.Z., B.W., L.Z., J.W., Y.L., M.X.).
2. Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China (Y.Z., B.W., L.Z., J.W., Y.L., M.X.).