MRI and MR Angiography
In This Section
Magnetic resonance imaging (MRI) is a sophisticated imaging system that combines radiofrequency waves, a powerful magnetic field and specialized computers. The technology produces exceptionally clear, detailed images of organs, tissue, bone or other internal body structures.
MRI images are viewed on a video monitor and can be easily shared electronically. Unlike many other imaging procedures, the MRI exam does not use x-ray radiation.
The remarkable clarity of an MRI image makes the method particularly helpful in the examination of small soft-tissue injuries to areas around the spine or joints. It is also used to investigate cancer, heart problems and neurological disorders, like strokes, brain tumors and multiple sclerosis. An MRI exam may also be ordered if the information from a CT scan or other imaging procedure is inadequate.
MRI exams are used to detect, diagnose and treat problems with the:
- Joints (knee, shoulder, hip, elbow, wrist)
- Ligaments and muscle
- Spine
- Brain
- Organs of the chest (heart and lungs)
- Abdominal organs (liver, kidney, spleen, pancreas)
- Reproductive organs
MRI Safety
MRI poses no known risk to most patients if appropriate safety guidelines are followed. However, MRI may be inadvisable if you have or believe that you might have any of the following:
- Brain aneurysm clips (some clips are acceptable. Please inform us prior to your appointment of your surgery date and clip type)
- Cardiac pacemaker
- Cochlear Implants
- Metal fragments in the eye
- Are or may be pregnant
- Implanted medication pumps
- Implanted nerve stimulating devices
- Intrauterine device (IUD)
- Any other surgically implanted or metallic object in your body
What can you expect during your exam?
When you arrive for your exam, you will fill out a medical history questionnaire and sign a consent form. If a contrast substance will be used during the exam, lab work may be completed to check your kidney function. The technologist will either give you a gown or check your clothing for metal before placing you on an exam table. Pillows and pads may be used to keep you comfortable and still.
Once you are in the proper position, a radio antenna device, called a coil, may be placed over the area of the body to be examined. The exam table moves into the MRI scanner and a series of images are taken in short intervals. You may hear thumping noises as the scanner takes the pictures.
It's important to remain as still as possible to avoid blurry images. You will be able to communicate with the technologist and/or radiologist via an intercom system.
An MRI exam is painless, but some patients struggle with claustrophobia. If this is a concern for you, inform the MRI team. Some patients may be given a sedative prior to the exam.
