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What is a CT scan of the head?

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A head computerized tomography scan uses a computer to process a series of X-ray images taken from several different angles, to develop cross-sectional views of the inside of the head, according to Mayo Clinic. A CT scan is generally used as an efficient tool to examine traumatic injuries.

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A head CT scan is a painless procedure in which the patient is placed on a table, and a large machine moves around the patient taking scans and images of the head, states MedicineNet. The patient is asked to lie still during the procedure, which may take 30 minutes to an hour.

CT scans can be used to examine nearly any part of the body, but a head CT scan may be used to obtain information about the facial bones, eyes, sinuses or the inner ear, states WebMD. A CT scan may be used to find the cause of symptoms such as paralysis, numbness, vertigo, headaches, vision problems, an aneurysm or bleeding inside the brain. It may also be used to locate problems of the inner ear bone or the auditory nerve or to find what causes headaches or loss of consciousness. It may be used to aid in preparation for a brain biopsy or to determine the damage caused by a stroke.

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