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Fig. 4. —68-year-old man with transient ischemic attacks. Image represents false-negative error with accurate sonographic interpretation but discrepant angiographic results.

D, Anterioposterior digital subtraction angiogram obtained during left common carotid artery injection shows ulcer en face (arrows) and left internal carotid artery does not appear to be narrow. Presumably, color Doppler image was obtained with ulcer en face. In retrospect, ulcer corresponds to area of turbulence.

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