Figure 4

A scatter plot of perfusion estimates in 40 single pixel regions of the myocardium (eight pixels in five LV slices; one slice per subject) when using the optimal λ value for each pixel region separately versus using one average λ value for each subject or when using a single average λ value for all 40 pixel enhancement regions. Perfusion estimates using five average λ values or a single average λ value for all the subjects were not significantly different than the perfusion estimates computed using optimal λ values for each pixel region separately (p = 0.54 and p = 0.14, respectively).