Cerebral MRI

BIOMED SCAN uses strong magnetic fields, radio waves and a computer to create detailed pictures of the spine or brain without using radiation. It is an extremely useful test for finding tumors, infections and certain types of injuries.

An MRI scan of the brain is painless, although it may be uncomfortable to lie still for long periods of time. You will hear humming, clicking and tapping sounds while the images are being recorded. Earplugs are usually available to reduce the noise from the scanner. You will be able to communicate with the technician throughout the exam through an intercom system and can ask for medication to help you relax, if needed.

Mapping the Brain: A Deep Dive into Cerebral MRI and Its Applications

During an MRI, the different structures of the brain are revealed in slices. Depending on the diagnosis, your doctor may recommend a contrast injection. Injections of intravenous gadolinium enhance the visibility of abnormalities and can improve diagnostic accuracy. Injections are given through a vein in the arm or hand. Some patients experience a temporary metallic taste in their mouth after the injection.

The lateral ventricles (two irregularly shaped cavities on either side of the midline) are visible in most axial scans. These structures are hyperintense on T2-weighted images because they contain a large amount of cerebrospinal fluid. The gyri of the cerebral cortex are normally tightly packed and distinguishable from one another. Wider sulci between the gyri indicate that cytotoxic edema has occurred, which often occurs in association with strokes and neurodegenerative disorders such as Alzheimer’s disease.