MRI

 

"MRI" is short for Magnetic Resonance Imaging. This test is different from an x-ray because it makes a picture of your body's organs, tissues, and bones without exposing you to radiation. An MRI uses a powerful magnetic field and a kind of radio frequency energy that makes two and three dimensional computerized images.

 

What happens before the MRI?

Before the actual test, you will be asked to fill out the screening questionnaire. You will be asked to remove all metal objects such as jewelry, your watch and clothing with metal zippers and buttons. You will be given a hospital gown to wear if need be. Next, you will be asked to lie down on a narrow bed. Once you are comfortable, the technician will gently push the bed inside a "doughnut" shaped tube.

 

What happens during an MRI?

Once in the “doughnut” shaped tube you will hear a series of loud knocking sounds. The staff will offer you ear plugs or head phones to block the sound. It will be important to lie as still as possible while the machine is making the images. The technician will be close by and guide you through the entire procedure.

 

How long will the MRI take?

The procedure usually takes about 20-30 minutes depending on the kind of information your doctor and radiologist might be looking for. If you move, it could take longer to get the images. You may be allowed to bring a favorite CD or you can ask if there is a collection of CDs to choose from. Listening to music will help the time go by.

 

Is an MRI painful?

The MRI test itself is painless. The machine never touches your body. Sometimes it is necessary to have an injection, called "contrast" before the test. This usually is a very minor discomfort - a quick prick that doesn't take too long.

 

Is an MRI safe?

MR imaging is approved by the FDA (Federal Drug Administration) for its safety and usefulness in diagnosing many different conditions. Doctors have been using this test since 1981 with good results. It is however very important to let the technician know if you have any metal implants or cardiac pacemaker before the procedure. These objects can move or not work properly if exposed to the magnetic field.

 

Will I be okay to go back to school or work?

After the MRI, you will be okay to go back to your daily activities, unless you required special medication to make you drowsy during the procedure. Your health care provider will let you know if you have any restrictions on what you can or cannot do after the MRI, as well as when the results will be available.

 

If you are scheduled to have an MRI at Children's Hospital Boston, here's some more information.

 

Written by the CYWH and YMH Staff at Children's Hospital Boston

 

Updated: 1/26/2010