Fig. 7

Surface coil intensity correction. Histogram of myocardial intensities within the myocardium before intensity correction (top panel) and after intensity correction (bottom panel), represented in black for culprit region and white for remote region. After intensity correction a decreased standard deviation of remote region is obtained and the mean intensity of the culprit region is higher than remote region. Myocardial intensities as after intensity correction (bottom panel) are used as input to the EM-algorithm with remote region and culprit region as initial classification and dashed blue lines indicating the constraints. Intensities below the 50th percentile of the remote region are kept classified as normal myocardium through the iterations of the EM-algorithm (lower dashed blue line). Intensities above the 75th percentile of the intensities within the culprit region are kept classified as MaR through the iterations of the EM-algorithm (upper dashed blue line). Dashed red line indicates the resulting cut off 0.5 of the Bayesian probability of MaR resulting from the EM-algorithm after intensity correction