This study compares new heart imaging methods using CT scans to the traditional PET scan, which is a gold standard for assessing myocardial perfusion (blood flow to the heart muscle). Participants will undergo a CT Myocardial Perfusion Imaging (CT-MPI) and CT Fractional Flow Reserve (CT-FFR) to see how these compare with PET Myocardial Perfusion Imaging (PET-MPI). This is important for diagnosing and managing coronary artery disease (CAD), where heart vessels may be blocked or narrowed.

• You need to be scheduled for a CT-MPI and willing to follow study rules.
• Pregnant women and those taking certain medications cannot join.
• The study is non-invasive with no mention of compensation or risks.

Note: Certain medical conditions and devices, such as pacemakers, might exclude you from participating. Make sure to discuss all eligibility criteria with your doctor to see if this study is right for you.