Figure 9

2D time-of-flight MRA runoff. 2D time-of-flight MRA of the pelvis, thighs, and calves in a patient with bilateral lower extremity claudication due to occlusion of the superficial femoral arteries bilaterally. Flow to the runoff vessels in the calves (ellipses) is through collateral arteries (open arrows) in the thighs arising from the profunda femoris arteries.