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Figure 4 Prevalence of Complicated AHA Type VI Lesions at Each MR Imaging Location

This graph shows the prevalence of complicated AHA type VI lesions at each MR imaging location with the x axis indicating the distance from the bifurcation and the locations of the minimum lumen area, maximum wall area, and maximum NWI for the artery. Locations from –12 to –6 mm were located in the common carotid artery, locations from –4 to 0 mm were located in the carotid bulb, and locations from 2 to 12 mm were located in the internal carotid artery; 2,378 locations are represented. AHA = American Heart Association; MR = magnetic resonance; NWI = normalized wall index.