Dr. McDonough welcomes Dr. Donald Frei, neuroradiologist and Director of Neurointerventional Surgery at Radiology Imaging Associates in Denver, CO. Dr. Frei is working towards establishing state-of-the-art diagnosis and management strategies in treating patients with acute stroke. His procedural specialties include acute catheter directed stroke intervention, angioplasty/stent revascularization of cerebrovascular stenosis and minimally invasive treatment of cerebral aneurysms and arteriovenous malformations.