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Fig. 1A. —78-year-old woman with severe carotid stenosis as depicted equally well with multiple overlapping thin-section acquisition MR angiography, contrast-enhanced MR angiography, and intraarterial digital subtraction angiography. Maximum-intensity-projection image from multiple overlapping thin-section acquisition MR angiogram shows focal severe stenosis involving left carotid bulb (straight arrow). Turbulent flow disrupts flow-related enhancement in internal carotid artery just beyond stenosis (curved arrow).