Subtraction angiography is a medical imaging technique used to visualize the arteries and veins in the brain and neck. During the procedure, a catheter is inserted into an artery, usually in the groin and threaded up into the arteries supplying the brain. A contrast dye is then injected through the catheter and rapid sequence X-ray images are taken to identify any abnormalities in the... https://www.newswirestats.com/cerebral-angiography-report-analysis/