1 Cardiology Division, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St.; Yawkey 5B, Boston, MA, 02114, USA.
2 Cardiovascular Imaging Research Center, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St.; Yawkey 5B, Boston, MA, 02114, USA.
3 Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, USA.
4 Gordon Center for Medical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, USA.
5 Cardiology Division, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St.; Yawkey 5B, Boston, MA, 02114, USA. mosborne@mgh.harvard.edu.
6 Cardiovascular Imaging Research Center, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St.; Yawkey 5B, Boston, MA, 02114, USA. mosborne@mgh.harvard.edu.