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Fig. 2A. —Velocity profile curve (velocity distance relationship superimposed on MR velocity mapping). Right—left in-plane (A), head—caudal in-plane (B), and through-plane (C) MR velocity mapping is obtained cinematically with temporal resolution of 80 msec, in common imaging plane including aortoiliac bifurcation. Superimposed graph represents velocity profile for each encoded direction across common iliac artery just distal to bifurcation. Vertical line (two arrowheads) indicates anatomic position of edge of vessel wall and corresponds to site of indicator (one arrowhead) on MR velocity mapping. Horizontal and vertical axes of graph represent distance across common iliac artery from edge of vessel wall and blood flow velocity in each direction.

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