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European Radiology Experimental
Fig. 6 | European Radiology Experimental

Fig. 6

From: Myocardial tissue characterization by combining late gadolinium enhancement imaging and percent edema mapping: a novel T2 map-based MRI method in canine myocardial infarction

Fig. 6

Corresponding short-axis MR images and post-processed parametric maps are shown. The MI region appears enhanced in the LGE image (a). Thresholded LGE image shows the irreversibly injured region as a white area (b). T2-weighted image (c) and corresponding thresholded T2-weighted image (d) highlight the increased signal in the MI region and septum (white arrows). Note that the crude method of thresholding T2-weighted images overestimates ME and is unable to differentiate regions with a varying extent of ME. Therefore, T2-weighted imaging cannot differentiate hemorrhagic from non-hemorrhagic MIs. PEM (f) calculated from the R2 map (e) shows the AAR (black arrows). There is an apparent lack of ME in the center of the MI due to cancelling effect by acute hemorrhage. TCM (g) generated from b and f defines the ME region surrounding the non-hemorrhagic part of the necrotic tissue, and the hemorrhagic region in the center of the MI. Corresponding TTC pathology is shown in Fig. 3

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