For cerebral angiography, your health care provider will insert a skinny, flexible tube known as a catheter into your carotid artery. Dye will probably be injected, then an X-ray will likely be taken to view any abnormalities. This test is more invasive than another varieties of imaging, rendering it riskier. https://sgvasculargrp.com/medical-condition/carotid-arterial-disease/