Figure 2. Posteroanterior digital subtraction angiograms in a patient with peripheral occlusive disease stage 2b, according to Fontaine classification. Left: Intraarterial angiogram obtained before PTA shows a circumscribed high-grade de novo stenosis of the superficial femoral artery (arrow). Middle: Angiogram obtained after successful PTA, shows slight vessel-wall irregularities. The proximal and distal edges (arrows) of endovascular radiation are marked. Right: Angiogram obtained after 6 months demonstrates a normal vessel within the region of PTA and at the edges of the irradiated segment.