1. Department of Radiology (D.S.H., N.B., G.C., W.L., C.Y.), University of Washington, Seattle.
2. Department of Electrical and Computer Engineering (L.C., J.-N.H.), University of Washington, Seattle.
3. Division of Vascular Surgery, Department of Surgery (H.W., T.S.H.), University of Washington, Seattle.
4. Centre for Imaging Sciences, Division of Informatics Imaging & Data Sciences, School of Health Sciences, Faculty of Biology Medicine & Health, Manchester Academic Health Sciences Centre, The University of Manchester, Manchester, United Kingdom. (J.C.W.).