Myocardial perfusion imaging can be used to assess whether the treatment was successful. The physician can measure changes in myocardial perfusion or blood flow to the heart with PET/CT imaging, before and after treatment. The highly sensitive PET/CT scan can be used by physicians to re-evaluate blood flow after bypass surgery or angioplasty, can provide measurements of the progression of coronary artery disease over time, and can provide information to help the physician assess improvement in coronary heart perfusion with therapies, such as lipid lowering treatment.