Control angiography. a Digital subtraction angiography showing severe stenosis with severe calcification in the left proximal superficial femoral artery. b Digital angiography of the middle to distal part of the left superficial femoral artery showing chronic total occlusion with severe calcification. c: Digital subtraction angiography of the distal superficial femoral artery to the proximal popliteal artery showing severe tandem stenosis with severe calcification. d Digital subtraction angiography of the below-the-knee lesions showing the total occlusion of three vessels