Baseline visit: Informed consent will be signed. Vital signs will be taken and blood drawn fasting for baseline values. A MRI would be performed with black blood imaging of the SFA of both legs. Approximately 10-15 cm of each leg would be covered, using a specifically designed surface coil (Machnet, Leiden, NL). The imaging would start at the bifurcation of the common femoral and proceed distally. The pulse sequence used will be a black blood turbo spin echo proton density weighted sequence with 3mm slice thickness and 3mm gaps that will be subsequently interleaved. A single slice with an extensive amount of plaque will be chosen for imaging of plaque characteristics including T1- and T2-W imaging. Finally, a calf muscle perfusion study will be performed in the leg that is most symptomatic and/or has the lowest ABI in the absence of claudication symptoms. The calf will be wrapped in a flexible surface coil in a 3T scanner. Subjects will be placed supine in the MR scanner with the calf at the magnet isocenter. A thigh cuff will be inflated up to 250 mmHg for 5 min. Arterial spin labeling images of the mid-calf will be obtained immediately after release of the cuff.Regions of interest will be drawn on the relative blood flow maps corresponding to calf muscle groups to measure perfusion in ml/min/100g.