Figure 18b. Reconstitution of the calf arteries in a 55-year-old woman with left-sided claudication. (a) Coronal MIP image from contrast-enhanced MR angiography performed with dedicated calf injection shows focal occlusion of the left popliteal artery just above the trifurcation (large arrow) with reconstitution of the calf arteries. Note the collateral vessel feeding the anterior tibial artery (small arrows). (b) Sagittal MIP image from high-resolution TOF angiography shows a patent posterior tibial artery feeding the plantar arteries (large arrows). The patent anterior tibial artery continues as the dorsalis pedis artery (small arrows).