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Figure 3 Comparison of infarct size measured from short-axis images by delayed contrast-enhanced magnetic resonance imaging (MRI) using different techniques. The arrow demonstrates the border zone, areas with partial enhancement on the edge of the infarct, which may lead to visual ambiguity in assessing the delayed hyperenhanced area. The infarcted region was delineated by the different techniques using different criteria, as shown by contours in red: 1 = visual; 2 = standard deviation (1 SD); and 3 = full-width at half-maximum (FWHM). Significant variability among segmentation methods is noted, especially related to the inclusion of the border zone on the analysis. The MRI infarct size was compared with postmortem measurements (triphenyltetrazolium chloride [TTC] pathology).
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