FIG 2. Images in a 64-year-old man with a TIA of the right hemisphere.

A, MRA image shows a short flow-void artifact distal to a visible irregular plaque in the internal carotid artery (arrow). All other available projections of the 3D TOF MRA images (except for two directions with over-projection that made the internal carotid artery invisible, 12 total) showed an interruption in the blood-flow signal intensity. The flow void was confirmed on the transversal 2D TOF MRA images.

B, DSA image also shows the irregular stenosis with an ulcerated plaque in the internal carotid artery. The measurement of the most severe stenosis with DSA, however, revealed a moderate (50–69%) stenosis (arrow).