What is an MRI Scan?
Magnetic resonance imaging (MRI) is a method of creating 3D images of parts inside the body. Instead of x-rays, the MRI scanner uses magnetism and radio waves to produce remarkably clear pictures of your chest, abdomen, heart, brain, back, blood vessels and spine. An MRI scanner consists of a strong magnet with a radio transmitter and receiver to gather information. MRI produces soft-tissue images and is used to distinguish normal, healthy soft tissue from pathologic tissue.

How to prepare for the procedure?
No special preparation is needed prior to the exam, unless your doctor has given you other instructions. You will be asked to complete a safety screening form and answer questions pertaining to your medical history. Please wear loose clothing without zippers or metallic parts. Remove all jewelry, watches, hairpins, glasses, wallets and other metallic objects.

How is the procedure performed? After you have removed all metal objects, the technologist will position you on a special table, and the table will then slide into the scanner. During any MRI examination, you will be able to communicate with the technologist. For clear pictures, you will be asked to hold very still and relax. In some cases, you will be asked to hold your breath. Any movement, especially of your head or back (even moving your jaw to talk) during the scan may blur the pictures. While the machine is taking your pictures, you will hear rapidly-repeating, thumping noises coming from the walls of the scanner. For additional comfort earplugs or music may be provided. During this time, you should breath quietly and normally but otherwise refrain from any movement. When the thumping noise stops, you must refrain from changing your position or moving about until the technologist lets you know it is OK to do so, even when the thumping noise stops. This whole procedure will usually be repeated several times, and the entire exam ordinarily takes between 15 and 30 minutes to complete.

Risks
Any metallic substance on your person can affect the quality of the diagnostic images. It can also cause discomfort or even injury to you when placed into the magnetic field.

The results
The radiologist will study your examination and will give the report to your doctor. Then your doctor will discuss the results with you and explain what they mean in relation to your health.

This information is provided to you as a public service, and is in no way meant to replace or supersede the information or advice provided from a qualified health care professional.

Frequently Asked Questions