MRI of the Joints and Extremities
- What is an MRI of the joints and extremities?
- Why might my doctor recommend an MRI of the joints or extremities?
- How should I prepare for my MRI of the joints or extremities?
- How is an MRI of the joints or extremities performed?
- What type of equipment is used for an MRI of the joints or extremities?
- Will I experience any side effects from an MRI of the joints or extremities?
- How will I get the test results from my MRI of the joints or extremities?
What is an MRI of the joints and extremities?
Magnetic resonance imaging, or MRI, is a method of producing detailed pictures of organs and body tissues by exposing a patient to radio waves in a strong magnetic field. The field is measured and analyzed by a computer, which forms two- or three-dimensional images that may be viewed on a monitor. Because it uses radio waves and a magnetic field rather than x-rays, there is no exposure to radiation. An MRI can be used to examine every joint in the body. Most commonly the spine, knee and shoulder are viewed, but the procedure also can be performed on the hips, wrists, and hands. An MRI is often the best choice when examining joints because it provides very clear pictures of the soft tissue near and around the bones. The procedure often is used to diagnose sports-related injuries and work-related injuries.
Why might my doctor recommend an MRI of the joints or extremities?
Your doctor may recommend an MRI of the joints or extremities to identify and locate the cause of bleeding, swelling or pain in your bones and muscles. Small tears to muscles, ligaments and tendons also can be detected. An MRI of the joints or extremities can be used to present a clear picture of degenerative disorders such as arthritis. In addition, an MRI of the joints and extremities sometimes is used to identify tumors and infections in the bone and joints and mases in the soft tissue.
How should I prepare for my MRI of the joints or extremities?
On the day of the procedure, wear comfortable clothing and try to relax. Before the procedure begins, you will be asked if you have any metal medical equipment in your body such as a pacemaker, intrauterine device (IUD), implanted port, or infusion catheter. Due to the strong magnetic fields created by MRI, these devices may interupt the procedure. Also, make sure to notify the technologist if you might be pregnant. Before the procedure begins you also will be asked to remove any metal jewelry or metal external objects as they may interfere with the procedure.
How is an MRI of the joints or extremities performed?
You will be asked to lie on your back on a cushioned table. A device called a coil will be placed on the area to be scanned. Coils are antennas used in every scan to help image the area of interest. Different coils are designed for different parts of the body and will conform to your shape as your are being imaged. You will not experience any discomfort from the coil.
After you are positioned, the table will move under the magnet. The radiologic technologist will leave the room once the procedure begins to control the equipment and perform your scan. You will be able to communicate with the technologist through an intercom during the procedure. The machine will make a slight rapping sound as the images are being taken. In between scans the machine is quiet. The process takes between 30 and 45 minutes and is painless.
What type of equipment is used for an MRI of the joints or extremities?
An MRI can be performed in either a closed or an open MRI scanner. A closed scanner requires you to lie in a clylinder-like compartment. An open MRI is ideal for claustrophobic, pediatric, elderly and large patients. This procedure uses a scanner that is less confining. Both types of scanners can provide your physician with accurate and detailed images of your joints or extremities.
Will I experience any side effects from an MRI or the joints or extremities?
In some cases, your physician or the radiologist may request a contrast agent (dye) be used to improve the quality of the images. The agent is designed to make organs and blood vessels more visible, and will likely cause no side effects. You may experience a metallic taste in your mouth and in rare cases you may experience more serious side effects. The technologist can answer any questions about possible side effects.
How will I get the test results from my MRI of the joints or extremities?
The results of your MRI are read by the board-certified radiologists of Professional Radiology, Inc. A detailed report will be sent to your referring physician within 24 hours.
