1 Department of Radiology and Biomedical Imaging, Center for Intelligent Imaging, University of California, San Francisco, 505 Parnassus Ave, Box 0628, San Francisco, CA 94143 (J.M.); Department of Radiology, University of Cincinnati, Cincinnati, Ohio (A.V.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.C.W.).