Comparison of Intravascular Ultrasound-Guided vs. Angiography-guided Angioplasty and Dual-antiplatelet v. Triple-antiplatelet Therapy for Outcomes of Drug-coated Balloon in the Treatment of Femoropopliteal Artery Disease (IVUS-DCB)

Inclusion Criteria: * Age 19 years or older * Symptomatic peripheral artery disease: * Moderate or severe claudication (Rutherford category 2 or 3) * Critical limb ischemia (Rutherford category 4 or 5) * Femoropopliteal artery disease (stenosis \> 50%) * ABI \<0.9 * Patients with signed informed consent Exclusion Criteria: * Acute critical limb ischemia * Severe critical limb ischemia (Rutherford category 6) * Known hypersensitivity or contraindication to any of the following medications: heparin, aspirin, clopidogrel, cilostazol, or contrast agents * Patients requiring oral anticoagulation using warfarin or NOAC * Age \> 85 years * Severe hepatic dysfunction (\> 3 times normal reference values) * Significant leucopenia, neutropenia, thrombocytopenia, anemia, or known bleeding diathesis * LVEF \< 40% or clinically overt congestive heart failure * Pregnant women or women with potential childbearing * Life expectancy \<1 year due to comorbidity * Previous bypass surgery or stenting in the target femoropopliteal artery * Untreated inflow disease of the ipsilateral pelvic or femoropopliteal arteries (more than 50% stenosis or occlusion)