A scatter plot between Q
(ration of the image-derived metric) and r (the ration of the flow). Q
(BA), where BA is without stenosis. Observe that when QM < 1, the ration of the flow is high indicating no apparent stenosis. However, when QM >1, the flow ratio drops significatly. When an exponential decaying function is fit through the data, an R2 of 0.68 is achieved and the regression is deemed significant (P < 0.001) with a power or 0.99.