1Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing, China, People's Republic of, 2MR Collaborations NE Asia, Siemens Healthcare, Beijing, China, People's Republic of, 3Department of Radiology, University of Illinois at Chicago, Chicago, IL, United States, 4Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States