1. From the Department of Radiology, The University of Chicago, 5841 S Maryland Ave, MC2026, Chicago, IL 60637 (Q.H., H.M.W., H.L., M.L.G.); Department of Physics, Wheaton College, Wheaton, Ill (H.M.W.); and Department of Breast Imaging, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Medical University, Tianjin, China (Y.J., P.L.).