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Cerebral angiography is a diagnostic test that uses an X-ray. It produces a cerebral angiogram, or an image that can help your doctor find blockages or other abnormalities in the blood vessels of your head and neck. Blockages or abnormalities can lead to a stroke or bleeding in the brain.
For this test, a doctor injects a contrast medium into your blood. The contrast material helps the X-ray create a clear picture of your blood vessels so that your doctor can identify any blockages or abnormalities