Figure 3. Posteroanterior intraarterial digital subtraction angiograms in a patient with peripheral occlusive disease stage 2b, according to the Fontaine classification. Left: Angiogram obtained before PTA shows a short high-grade stenosis of the popliteal artery (arrow). Middle: Image shows the result of a successful PTA without endovascular irradiation. Right: Angiogram obtained after 6 months shows more than 50% restenosis (arrow).