How does MRI work?

During the examination, you will be placed into the bore of a large magnet. The magnetic field created by the magnet causes the hydrogen atoms of the water molecules in the body to be aligned. A low energy radio signal of a very specific frequency from the scanner changes this alignment. As they return to their previously aligned position (relax) the molecules then give off their own signal which the MRI's coil (antenna) is able to receive. A sophisticated computer converts these signals to very precise images of the area of the body being examined.


What will happen during the exam?

Upon arriving at Greensboro Orthopaedics, you may be asked to change into a patient gown so that metal zippers and snaps do not interfere with the test. In addition, you must remove anything else which may contain metal. This includes jewelry, hairpins, hearing aids, dental work, and makeup. The technologist will position you on a padded table which will slide into the scanner. You will not be placed in any uncomfortable positions. A coil may be placed in the area of the body to be examined. It is important that you remain as still as possible during the test so that the pictures are not blurred. However, you should relax and breathe normally. You may even take a nap if you wish.

During the test, none of the equipment will move. You will hear rhythmic knocking sounds as the scanner works. This is normal. The examination is made up of a series of several short imaging sequences. The entire exam should take from 30 to 90 minutes. The technologist will control the exam from another room but can see and hear you at all times.

When the examination is over, the technologist will help you up. You may resume normal activities unless they have been limited by your doctor. A specially trained radiologist will review your MRI exam and report the results to your doctor at Greensboro Orthopaedics. Your doctor will then discuss the results with you.

MRI's can not be performed for the following reasons if you:

    have a Pacemaker
    have Aneurysm Clips
    have a Cochlear Implant
    have Metallic Eye Fragments
    have a Spinal Cord Stimulator

    Please notify the technologist if you have any of the above items or if you are pregnant, breast feeding, have an IUD or prosthetic device.