CT Brain with or without Contrast
Computed tomography (also CAT or CT scan) of the brain (cerebral hemispheres, cerebellum and brain stem.)
Indications
A CT brain is ordered to look at the structures of the brain and evaluate for the presence of pathology, such as mass/tumor, fluid collection (such as an abcess), ischemic processes (such as a stroke). It is particularly good for hemorrhage, trauma or fracture to the skull and for hydrocephalus.
- Bone abnormalities
- Brain mass/tumor
- Fluid collection, such as an abcess
- Hemorrhage
- Hydrocephalus
- Ischemic process, such as a stroke
- Trauma or fracture of the skull
Contrast
- CT of the brain can be done with or without contrast, but it is often not needed.
- In general, it is preferred that the choice of contrast or no contrast be left up to the discretion of the imaging physician.
Preparation
Without Contrast:
- No preparation is required.
With Contrast:
- Only one CT contrast study should be scheduled within a 48 hour period.
- BUN & Creatinine must be done within 72 hours of the scan.
- Nothing but clear liquid after midnight before the scan.
- NPO 4 hours prior to exam (no food or drink).