Myocardial Perfusion and Fractional Flow Reserve

Myocardial CT perfusion imaging is a rapidly evolving technology that allows assessment of the functional significance of potentially obstructive coronary stenosis. The opportunity for quantification of myocardial perfusion is the greatest potential advantage of CT compared with other perfusion techniques. On the other hand, fractional flow reserve during coronary angiography provides a functional assessment of coronary lesions identified with this modality. Recently, a non-invasive method for estimating fractional flow reserve, based on coronary CT angiography has been introduced. Nevertheless, at present neither CT perfusion nor CT FFR are ready for widespread use in clinical routine.