1. From the Imaging Service, Baltimore VA Medical Center, 10 N Greene St, Room C1-24, Baltimore, MD 21201 (K.C.W., J.B.P., E.L.S.); Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Md (K.C.W., J.B.P., B.V., M.T., E.L.S.); Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pa (B.C.); Indiana University School of Medicine, Indianapolis, Ind (D.J.V.); Regenstrief Institute, Indianapolis, Ind (D.J.V., S.A.); and...