Computed Tomography (CT)

Computed Tomography (CT) uses a series of x-rays of the head taken from many different directions. CT scanning requires the use of a computer that performs a numerical integral calculation (the inverse Radon transform) on the measured X-ray series to estimate how much of an X-ray beam is absorbed in a small volume of the brain.

Structural neuroimaging is useful in first-episode psychosis patients with neurological symptoms, atypical clinical picture, and old age.[1][2]

Indications for Choosing CT vs. MRI

CT Screening exam, delirium, acute hemorrhage, skull injury, calcified lesions,[3] and patients who cannot tolerate lengthier MRI.
MRI Sustained confusion, subtle cognitive deficits, atypical clinical findings, abrupt personality changes with neurological signs/symptoms, brain injuries.