1. From the Department of Radiology, Division of Breast Imaging and Intervention (C.U.L., G.K.H.), Department of Surgery, Division of Breast and Melanoma Surgical Oncology (M.A.P., D.M.), Department of Radiology, Division of Radiology Research (M.W.U.), and Department of Physiology and Biomedical Engineering (M.W.U.), Mayo Clinic, 200 First St SW, Rochester, MN 55905.