1. From the Department of Biomedical Sciences, Cedars-Sinai Medical Center, Biomedical Imaging Research Institute, PACT Bldg–Suite 400, 8700 Beverly Blvd, Los Angeles, CA 90048 (H.J.Y., D.D., B.S., I.C., R.T., P.S., R.D.); Department of Bioengineering (H.J.Y., R.D.) and David Geffen School of Medicine (D.D., P.S.), University of California, Los Angeles Calif; Lawson Health Research Institute, London, Canada (J.S., J.B., H.B., M.K., F.S.P.); and MR R&D, Siemens Healthcare, Los Angeles, Calif (X.B.).