This is a single cohort, technology assessment study. Thirty-five patients presenting with stable angina and a moderate pretest likelihood for CAD who are already scheduled to undergo invasive coronary angiography (ICA) for the clinical indication of angina will be recruited to undergo a cCTA examination with FFR followed immediately by regadenoson stress-rest PET on the same PET/CT scanner.~Sensitivity, specificity, NPV, PPV of CTA-cFFR will be obtained using the reference standard of standard of care ICA with FFR for each epicardial coronary artery.~Segmental stress PET MBF will be compared to presence or absence of a coronary artery stenosis ≥ 50% diameter on CCTA and ICA.
The broad, long-term objective of this pilot study is to develop an optimal, clinically usable, non-invasive evaluation of Coronary Artery Disease (CAD) in the setting of stable angina which provides both anatomic and functional information.~Patients already scheduled to undergo Invasive coronary catheterization (ICA) for the clinical indication of angina will be recruited to under go stress-rest Positron Emission Tomography-Coronary CT Angiography-Fractional Flow Reserve (PET-cCTA-cFFR)