1. From the Department of Radiology, University of Washington, Seattle, Wash (D.B., D.S.H., M.R.D., M.Z., J.R.S., H.R., S.C.P.); Philips Medical Systems International, Best, the Netherlands (Y.W.); and Department of Breast Imaging, Seattle Cancer Care Alliance, 1144 Eastlake Ave E, LG2-200, Seattle, WA 98109 (J.R.S., H.R., S.C.P.).