 Single center randomized clinical trial, to evaluate the safety and efficacy of carotid artery stenting using the RX ACCULINKTM Carotid Stent System with RX ACCUNETTM Embolic Protection System or PercuSurge GuardWire 3-6 Temporary Occlusion and Aspiration System using Angiomax bivalirudinversus heparin as the anticoagulant for treatment of occlusive carotid artery disease in low and high risk patient cohorts. 