Minimally invasive surgical procedure that examines the blood vessels of the spine. It is used to diagnose and assess blood vessel abnormalities in and around the spinal cord and spinal column such as arteriovenous malformations and arteriovenous fistulae. A small catheter is inserted in a blood vessel in the groin (femoral artery) and travels inside the arteries to reach the blood vessels of the spine. A dye (contrast) is injected through the catheter while specialized x-ray machines take images as the dye travels through the spine’s vascular system. This enables our specially trained Comprehensive Vascular Neurosurgeons to evaluate these abnormalities and determine the appropriate treatment.