As the survival for NSCLC has gradually improved, there is increasing concern about long term radiation-induced cardiac toxicities and support in minimizing the dose to the left anterior descending artery. Myocardial perfusion (the delivery of blood to the heart muscle) evaluated by PET CT scans could be a useful tool to assess early cardiac damage by radiation, so this study will prospectively and quantitatively assess myocardial blood flow and myocardial flow reserve with 18F-Flurpiridaz PET CT prior to and after radiation therapy.
