1. From the Department of Radiation Oncology (B.W.L., S.G.S., L.W., A.L., B.P.F., X.S.), Stanford Cancer Institute (B.W.L., S.G.S.), Department of Radiology, Division of Nuclear Medicine and Molecular Imaging (A.I.), and Department of Medicine (Cardiac Electrophysiology) (L.N., P.Z.), Stanford University School of Medicine, Stanford, CA; Cardiac Electrophysiology, Texas Cardiac Arrhythmia Institute, Austin, TX (A.A.-A.); and Department of Medical Affairs, CyberHeart, Inc., Portola Valley, CA (E.G., T.F...