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Cervical MRI scan

Definition

A cervical MRI (magnetic resonance imaging) scan uses energy from strong magnets to create pictures of the part of the spine that runs through the neck area (cervical spine).

MRI does not use radiation (x-rays).

Single MRI images are called slices. The images can be stored on a computer or printed on film. One exam produces many images.

Alternative Names

MRI - cervical spine; MRI - neck

How the test is performed

You will wear a hospital gown or clothes without metal zippers or snaps (such as sweatpants and a t-shirt). Some types of metal can cause blurry images.

You will lie on a narrow table that slides into a tunnel-shaped scanner.

Some exams use a special dye (contrast). Most of the time, you will get the dye through a vein in your arm or hand before the test.The dye can also be given through an injection. The dye helps the radiologist see certain areas more clearly.

During the MRI, the person who operates the machine will watch you from another room. The test most often lasts 30-60 minutes, but may take longer.

How to prepare for the test

You may be asked not to eat or drink anything for 4 - 6 hours before the scan.

Tell your doctor if you are afraid of close spaces (have claustrophobia). You may be given a medicine to help you feel sleepy and less anxious. Your doctor may suggest an "open" MRI, in which the machine is not as close to the body.

Before the test, tell your health care provider if you have:

  • Brain aneurysm clips
  • Certain types of artificial heart valves
  • Heart defibrillator or pacemaker
  • Inner ear (cochlear) implants
  • Kidney disease or dialysis (you may not be able to receive contrast)
  • Recently placed artificial joints
  • Certain types of vascular stents
  • Worked with sheet metal in the past (you may need tests to check for metal pieces in your eyes)

Because the MRI contains strong magnets, metal objects are not allowed into the room with the MRI scanner:

  • Pens, pocketknives, and eyeglasses may fly across the room.
  • Items such as jewelry, watches, credit cards, and hearing aids can be damaged.
  • Pins, hairpins, metal zippers, and similar metallic items can distort the images.
  • Removable dental work should be taken out just before the scan.

How the test will feel

An MRI exam causes no pain. You will need to lie still. Too much movement can blur MRI images and cause errors.

The table may be hard or cold, but you can ask for a blanket or pillow. The machine makes loud thumping and humming noises when turned on. You can wear ear plugs to help block out the noise.

An intercom in the room allows you to speak to someone at any time. Some MRIs have televisions and special headphones to help the time pass.

There is no recovery time, unless you were given a medicine to relax. After an MRI scan, you can return to your normal diet, activity, and medicines.

Why the test is performed

The most common reasons for this test are:

  • Severe neck or arm pain that does not get better after treatment
  • Neck pain along with leg weakness, numbness, or other symptoms

A cervical MRI scan may also be done for:

  • Birth defects of the spine
  • Infection that involves your spine
  • Injury or trauma to the spine
  • Multiple sclerosis
  • Severe scoliosis
  • Tumor or cancer in the spine

MRI usually works better than CT scan in diagnosing these problems.

A cervical MRI may also be done before spinal surgery.

Normal Values

A normal result means the part of the spine that runs through your neck and nearby nerves appear normal.

What abnormal results mean

The most common reasons for an abnormal result are:

Abnormal results may also be due to:

Talk to your health care provider about your questions and concerns.

What the risks are

MRI contains no radiation. There have been no reported side effects from the magnetic fields and radio waves.

The most common type of contrast (dye) used is gadolinium. It is very safe. Allergic reactions to the substance are rare. However, gadolinium can be harmful to people with kidney problems that need dialysis. If you have kidney problems, please tell your health care provider before the test

The strong magnetic fields created during an MRI can cause heart pacemakers and other implants to not work as well. It can also cause a piece of metal inside your body to move or shift. For safety reasons, please don't bring anything that contains metal into the scanner room.

References

The Spine. In: Grainger RC, Allison D, Adam, Dixon AK, eds. Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 60

Torg JS. Cervical spine injuries. Huber FG. Arm. In: DeLee JC, Drez D Jr, Miller MD, eds. DeLee and Drez’s Orthopaedic Sports Medicine. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2009:chap 16.

Chou R, Qaseem A, Owens DK, Shekelle P; for the Clinical Guidelines Committee of the American College of Physicians. Diagnostic Imaging for Low Back Pain: Advice for High-Value Health Care From the American College of Physicians. Ann Intern Med. 2011 Feb 1;154(3):181-189.

Gardocki RJ, Camillo FX. Other disorders of the spine. In: Canale ST, Beaty JH, eds. Campbell's Operative Orthopaedics.12th ed. Philadelphia, Pa: Modby Elsevier; 202:chap 44.


Review Date: 1/17/2013
Reviewed By: C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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