Figure 2

Otsu’s Automated Thresholding (OAT) method. Top row: Short-axis late gadolinium images from basal to apical (left to right). Middle row: Enhancement (yellow) signifying infarct, designated on a slice-by-slice basis by OAT method. Bottom row: OAT automatically identifies hyperenhanced areas by selecting the grayscale signal intensity threshold (red) on a slice-by-slice basis that gives the minimal intraclass variance within enhanced and normal myocardium.