Answer:
Cerebral angiography
Explanation:
Cerebral angiography (arteriography) is a technique used to detect abnormalities of cerebral blood vessels - such as arterial dilation (aneurysm), inflammation (arteritis), abnormal configuration (arteriovenous malformation) or vascular obstruction (stroke ).
In this technique, radiopaque contrast (X-ray-visible substance) is injected into an artery that irrigates the brain, thus revealing the pattern of cerebral blood flow on radiographs. Magnetic resonance imaging may also be used, in the case shown above, to show the blood flow pattern of the neck and base arteries of the brain, but the images are of poorer quality than cerebral angiography.
