1Center for MR Research, University of Illinois at Chicago, Chicago, IL, United States, 2Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China, People's Republic of, 3Philips Research China, Shanghai, China, People's Republic of, 4Department of Radiology, University of Illinois at Chicago, Chicago, IL, United States, 5Department of Radiology, Xinhua Hospital, Shanghai, China, People's Republic of, 6Departments of Radiology, Neurosurgery, and Bioengineering, University of Illinois at Chicago, Chicago, IL, United States