Figure 1
Assessment of heterogeneous scar area (HSA). A) Mid-ventricular short axis LGE image of a patient with considerable LGE (red arrow) in ventricular septum and anterior wall, and a region of interest in normal myocardium in the inferior wall (ROI; orange box) used to define thresholds for LGE. RV indicates right ventricle; LV, left ventricle. B) Endocardial (red) and epicardial (green) borders were outlined manually. Grayscale threshold 2SDs above the mean signal intensity of the ROI (red shading) was outlined. C) Grayscale threshold 4SDs above the mean signal intensity of the ROI (red shading) were considered as scar core and is shown in red shading. D) HSA2-4SD defined as the signal intensity between ≥2SD and <4SD is shown in yellow shading, superimposed on scar core (>4SD) in red shading.