1. From the Raymond and Beverly Sackler Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine (J.Z., L.N., M.R., M. Ahmed, L.W.D., A.A., A.J.S., M.M.S.), Yale University School of Medicine, New Haven, Conn; VA Connecticut Healthcare System (J.Z., L.N., M.R., M. Ahmed, A.A., M.M.S.), West Haven, Conn; and Lantheus Medical Imaging (D.S.E., M. Azure), North Billerica, Mass.