Fig. 2

Example of endocardial border sharpness analysis in short axis view. Eight equidistant profiles are manually drawn perpendicular to the myocardium-blood interface, avoiding scar and myocardial trabeculations. For each profile, the image sharpness is defined as the pixel distance d between the 20% and 80% of the total intensity range r. The sharpness value was averaged across the 8 profiles for each volunteer and image type