Robert J H Miller1,2,3, Piotr J Slomka4. 1. Department of Cardiac Sciences, University of Calgary, Calgary, AB, Canada. robert.miller@ahs.ca. 2. Libin Cardiovascular Institute, Calgary, AB, Canada. robert.miller@ahs.ca. 3. Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA. robert.miller@ahs.ca. 4. Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA.