MRI (which stands for Magnetic Resonance Imaging) is the newest way to view the human body since the CT ("CAT") scanner was invented. Unlike CT scans, MRI does not use radiation in the conventional sense of the word. Rather, it combines the use of a large magnet and radio waves. The hydrogen atoms in the patient's body react to the magnetic field, and a computer analyzes the results and makes pictures of the inside of your body.

The MRI scanner consists of a large, donut-shaped magnet with a scanning table. The technologist (the person who takes the pictures) will position you on the table, and then move the table so that the area of interest is in the centre of the machine's "tunnel". This tunnel remains open on the end; you are not "closed in." During the examination, you will hear a series of loud knocking sounds. You must remain very still at this time, as this is when the pictures are being taken.

What should you do if you are claustrophobic?     The answer to this depends on how uncomfortable a small space makes you feel. If you have difficulty getting on an elevator, or dislike being in a room without windows, then you should tell this to the receptionist.

MRI is a painless exam. You will hear loud noises, however, so you may want to wear ear-plugs or headphones, which the clinic can provide. In order to complete the examination several pictures may be needed. Each picture can take from a few seconds to fifteen minutes. A full examination could take anywhere from twenty minutes to an hour and a half.

For an abdominal MRI you should have nothing to eat or drink for 6 hours before your test. You should, in all cases, continue to take your medication. When you arrive for your exam, you will be asked to change into a hospital gown. Buttons, zippers, and other metal objects will affect the pictures. Please leave as much jewelry at home as possible. You should wear little eye make-up as this can affect the pictures also.

Special note:    The presence of metal objects may affect the picture. Please be sure to inform the technologist or the radiologist if you have had any metal objects within in your body, such as pacemakers, aneurysm clips, or a prosthesis.