Evaluation of Luminal Expansion Following Stenting of Femoro-popliteal Occlusive Disease

Inclusion Criteria: * Age ≥ 18 years * Patient (or legally authorized representative) must give a written informed consent. * Symptomatic peripheral-artery disease with moderate or severe intermittent claudication and failure of medical treatment (Rutherford stage 2,3) or chronic critical limb ischemia with pain while the patient is at rest (Rutherford stage 4) or chronic critical limb ischemia with ischemic ulcers (Rutherford stage 5, 6) and stenosis of more than 70 percent or occlusion of the ipsilateral superficial femoral artery and/or proximal popliteal artery with a target-lesion length of ≥ 8 and ≤ 20 cm and at least one patent (less than 50 percent stenosed) tibioperoneal runoff vessel (TASC A,B,C lesions)25. Proximal popliteal artery is defined as the popliteal artery above the joint line. The distal portion of the lesion should be located at least 4 cm above the joint line and the distal end of the stent 2 cm above the joint line. * ABI ≤ 0.9 at rest. Toe-Brachial Index (TBI) may be used if ABI is inadequate. * Lesion with a calcification percentage of at least 25% based on CTA evaluation (within 6 months of patient enrolment) Exclusion Criteria: * Acute critical limb ischemia * Untreated inflow disease of the ipsilateral pelvic arteries (more than 50 percent stenosis or occlusion). * Renal failure, creatinine clearance \< 50 µmol /l * Severe allergy to iodine contrast * Patients with uncorrected bleeding disorders or patients who cannot receive anticoagulation or antiplatelet aggregation therapy * Lesions \< 8 and \> 20 cm in length * Calcification volume of less than 25%