Jagat Narula1, Vasken Dilsizian2, Y Chandrashekhar3. 1. Icahn School of Medicine, Mount Sinai Hospital, New York, New York. Electronic address: narula@mountsinai.org. 2. Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Maryland. 3. University of Minnesota/VA Medical Center, Minneapolis, Minnesota.