An MRI does much of the same. In the past, MRI's have been loud with a clunking sound. Patients are usually asked to relax as much as they can and to avoid swallowing. An angiogram, which is the most intense, but effective mode of detection. It is usually performed in a room where doctors inject dye throughout the patient's veins, using a catheder.
Radiologists can see the blood vessels of the brain on a television screen.
They see how the blood flows through blood vessels in the brain. AVM's, because of their nature are inevitable, but there are ways of reducing their chances of hemorrhaging. These include not smoking, exercise, stress reduction, and maintaining normal blood pressure. It is also recommended that you maintain good blood pressure and avoid the use of cocaine. Brain Injury Information Center.