Wingspan One Year Vascular Imaging Events and Neurologic Outcomes

Inclusion Criteria: * Inclusion criteria for this study are the 152 patients stented in the WEAVE trial on-label. The patients had the following inclusion criteria: * Age 18-80 * Intracranial artery stenosis greater or equal to 70% stenosis * Target artery 2 mm or larger * Presented with stroke while on medical therapy for stroke prevention * Prior stroke in the target territory * Modified Rankin Score of 3 or better (neurologic function) * Treated greater than 7 days after their last stroke * Treated with the Wingspan stent by an approved trial NeuroInterventionalist Exclusion Criteria: * Patients treated outside of the trial or who did not meet the entry criteria. * Patients that had stent treatment for arterial dissection * Patients that had extra-cranial stenosis * Patients outside the age range of the study * Patients treated less than 8 days from their stroke.