Magnetic Resonance Imaging (MRI)

What is a MRI?

Magnetic resonance imaging (MRI) is a sophisticated diagnostic technique that uses a magnetic field, radio waves and a computer to generate detailed images of human anatomy. Because it produces better soft-tissue images than x-rays, MRI is most commonly used to image the brain, spine, thorax, vascular system and musculoskeletal system (including the knee and shoulder).

During an MRI exam, you are placed inside a scanner that produces a static magnetic field up to 8,000 times stronger than the earth's own magnetic field.

Who should consult a physician before getting a MRI?

MRI is a safe procedure for most people. However, you should check with a physician before undergoing an MRI examination if you:

• Have a pacemaker
• Have cochlear implants
• Have aneurysm clips
• Are pregnant

How do I prepare for a MRI?

• If you have other types of metal implants or have been exposed to shrapnel, let the MRI technologist know as you may not be a candidate for this test
• If your eyes have been exposed to metal shavings, let the MRI technologist know as you may not be a candidate for this test
• If you are claustrophobic or experience pain when lying on your back for more than 30 minutes, let your physician know.
• Do not wear eyeshadow on the day of the exam (eyeshadow sometimes contains metallic substances)
• Remove all jewelry and wrist watches
• Do not bring credit cards and bank cards into the testing room

How is a MRI conducted?

During an MRI, you lie on a cushioned table that can move up or down and slide into and out from the tube shaped center of the scanner. You may be given an intravenous contrast agent to highlight internal organs and structures. You will not feel anything during the scan, but will hear intermittent humming, thumping, clicking and knocking sounds. These are the sounds of the magnetic gradients turning on and off.

The MR technologist observes you through a window from a room next door and talks to you through a two-way microphone system.

How do I schedule an appointment?

A physician's order is required to perform a MRI. Appointments can be scheduled by calling Central Scheduling at 520-469-8810.

How do I get my results?

When the exam is complete, the images obtained are given to a radiologist — a physician who specializes in the diagnostic interpretation of medical images. A report of the findings is sent to your physician. Your physician then advises you of the results and discusses if any further procedures are needed.