Magnetic Resonance Imaging

Magnetic Resonance Imaging

How does it work?

MRI uses a powerful magnetic field along with radio waves (Not X- ray) and a computer to produce highly detailed slice- by -slice" picture of virtually all the internal structures of the body. The result enables physician to examine part of the body in minute detail and identify disease in the ways that are not possible with other techniques. For examples, MRI is one of the few imaging tools that can see through bones, making it an excellent tool for examining the brain and other soft tissues.
Patient must remain still during the imaging process. And because the scan takes place as the patient slides through a rather small tunnel in the machine some people experience claustrophobia. In recent times, though, open MRI scanners have been developed for patience who are anxious or obese. Naturally no metal object such as pens, watches, jewelry hairpins, and metal zippers as well as credit cards and other magnetically sensitive items are allowed into examination room.
Risk:

If a contrast fluid is used, there is a slight risk of allergic reaction, but the risk is less than associated with the iodine based substances commonly used with X-ray and CT scans. Otherwise MRI poses no known risk to patient however because of the effect of strong magnetic field, patient with certain surgical implants or metal fragment from injury may be unable to have MRI. So if MRI is recommended for, be sure to tell your doctor and your MRI technologist if you have any of those things.
Benefits:

MRI does not use partially harmful radiation, and it is particularly good at dictating tissue abnormalities, especially those that may be obscured by bone.