1. From the Department of Radiology, University of Iowa Carver College of Medicine, 200 Hawkins Dr, Iowa City, IA 52242 (S.P., S.N.); Department of Electrical and Computer Engineering (D.D.D., M.J.) and Department of Biostatistics (E.S., K.D.C.), University of Iowa, Iowa City, Iowa; Department of Radiology, University of Miami, Miller School of Medicine, Miami, Fla (P.Y.A.); and Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wis (P.N.).