FIG 1. A, Lateral view of left common carotid angiogram shows 70% ICA stenosis by the NASCET method (arrow).

B, Color Doppler image shows severe ICA stenosis (arrow).

C, Power Doppler image shows 82% ICA stenosis by the linear stenosis parameter (arrow).

D, Flow velocity of poststenotic lesion indicates that PSV is 307 cm/s (arrow).