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Fig. 1A. —52-year-old man with severe right intermittent claudication. Maximum-intensity-projection reformations of CT angiograms of complete vascular tree show occlusion of right iliac arteries and bilateral occlusion of superficial femoral arteries. Note right midtibialis anterior point on B where segmentation of vessel (arrow, B) was impossible to see with our software. Distal course of artery was revealed with axial CT only. Left tibialis anterior artery is severely diseased and occluded distally (B).