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Computed Tomography (CT) in Neurologic Disorders

By

Michael C. Levin

, MD, College of Medicine, University of Saskatchewan

Last full review/revision Jul 2021| Content last modified Jul 2021
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Computed tomography Computed Tomography CT shows a focal area of osteolysis (arrows) involving the right acetabulum that is consistent with particle disease. In CT, an x-ray source and x-ray detector housed in a doughnut-shaped assembly... read more Computed Tomography (CT) provides rapid, noninvasive imaging of the brain and skull. CT is superior to magnetic resonance imaging (MRI) in visualizing fine bone detail in (but not the contents of) the posterior fossa, base of the skull, and spinal canal.

Normal Head CT Scan (Adult, Age 30)
Normal Head CT Scan (Adult, Age 74)

Noncontrast CT is used to rapidly detect acute hemorrhage and various gross structural changes without concern about contrast allergy or renal failure.

CT angiography using a contrast agent can show the cerebral blood vessels, obviating the need for MRI or angiography.

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