- - MRI Scans While there hasnŐt been any single test to determine if a patient has multiple sclerosis MRI, magnetic resonance imaging, scans have greatly contributed to the diagnosis of MS. The MRI scan is currently the most sensitive, non-invasive way of viewing possible degernating plaques of myelin in brain and spinal cord (Gertz). Unlike CAT scans and X-ray photos, the MRI doesnŐt use radiation. It instead uses powerful magnetic fields to interact with the hydrogen contained in the water molecule which is contained in all fluid and tissue in the body. Computers observe the interaction, and translate the data into a cross-sectional image. Although the lack of radiation is a plus, the strong magnetic fields exclude patients with pacemakers, or metal implants from using the technology. As helpful as an MRI scan is, it cannot on its own diagnose MS. About 5% of patients with multiple sclerosis still show no signs of lesions in the brain on the MRI (NMSS). Still the MRI is the preferred method to scan the brain and spinal cord to detect possible plaques or scarring caused by MS. This is a MRI of a patient with MS.

December 9, 1998