* To compare regional myocardial uptake of FDG on images obtained on a standard PET camera with the new PET/MR camera, in patients with coronary artery disease.
* To compare viability maps obtained with cardiac MR images and FDG-PET for delineation of myocardial infarct core and border zone, in patients with coronary artery disease.
* To correlate MRI myocardial strain with relative myocardial FDG uptake in patients with a previous myocardial infarction.
* To interrogate if simultaneous acquisition of cardiac PET and viability cardiac MR differ from acquisitions obtained independently, with special focus on attenuation correction methods
* To combined MRI scar map with FDG-PET uptake in patients with cardiac sarcoidosis and myocarditis.
* To correlate morphologic characteristics of atherosclerotic disease in the thoracic and abdominal aorta with FDG uptake and ferumoxytol enhancement, as a marker of inflammation.
* To evaluate cardiac strain and myocardial scar burden in obese patients with and without diabetes.
