Navigate Up

Seniors Center - A-Z Index

#
Q
Y
Z

Print This Page

Shoulder MRI scan

A shoulder MRI (magnetic resonance imaging) scan is a imaging test that uses energy from powerful magnets and to create pictures of the shoulder area.

It 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 dozens or sometimes hundreds of images.

Related tests include:

Alternative Names

MRI - shoulder; Magnetic resonance imaging - shoulder

How the Test is Performed

You may be asked to wear a hospital gown or clothing without metal snaps or zippers.(such as sweatpants and a t-shirt). Some types of metal can cause blurry images.

You will lie on a narrow table, which slides into a large tunnel-like tube.

Some exams require a special dye (contrast). The dye is usually given before the test through a vein (IV) in your hand or forearm. The dye can also be injected into the shoulder. 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 it 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 (sedative). Your doctor may also 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 in 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 cause errors.

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

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

There is no recovery time, unless you received medicine to relax. After an MRI scan, you can go back to your normal diet, activity, and medications.

Why the Test is Performed

MRI is a useful for diagnosing and evaluating sports injuries. It can provide clear pictures of parts of the shoulder (such as soft tissues) that are hard to see clearly on CT scans.

Your doctor may order this test if you have:

  • A mass that can be felt during a physical exam
  • An abnormal finding on an x-ray or bone scan
  • Shoulder pain and fever
  • Decreased motion of the shoulder joint
  • Fluid buildup in the shoulder joint
  • Redness or swelling of the shoulder joint
  • Shoulder dislocation
  • Shoulder weakness
  • Shoulder pain and a history of cancer
  • Shoulder pain that does not get better with treatment

Normal Results

A normal result means no problems were seen in your shoulder and surrounding tissue in the images.

What Abnormal Results Mean

Some possible causes of abnormal results may be:

  • Abscess
  • Bone infection (osteomyelitis)
  • Broken or fractured shoulder bone
  • Bursitis in the shoulder area
  • Anormal Osteonecrosis (vascular necrosis)
  • Rotator cuff tear
  • Rotator cuff tendinitis
  • Shoulder inflammation (frozen shoulder)
  • Tumor (including cancer
  • Labral tear
  • Cyst in the shoulder

This list does not include all possible problems. Talk to your health care provider with any questions and concerns.

Risks

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

The most common type of contrast (dye) used is gadolinium. It is very safe. Allergic reactions to the substance rarely occur. However, gadolinium can be harmful to people with kidney problems who require 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 not to work as well. It can also cause a piece of metal inside your body to move or shift. Please make sure you don’t bring anything that contains metal into the scanner room, it can become projectile and dangerous to you.

Considerations

Tests that may be done instead of an MRI of the shoulder include:

A CT scan may be preferred in some emergency cases, since it is faster and usually available right in the emergency room.

References

Wilkinson ID, Paley MNJ. Magnetic resonance imaging: basic principles. 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 5.

DeLee JC, Drez D Jr, Miller MD, eds. DeLee and Drez's Orthopaedic Sports Medicine. 3rd ed. Philadelphia, PA: Saunders Elsevier; 2009:chap 17.

Updated: 1/17/2013

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


©  UPMC | Affiliated with the University of Pittsburgh Schools of the Health Sciences
Supplemental content provided by A.D.A.M. Health Solutions. All rights reserved.

For help in finding a doctor or health service that suits your needs, call the UPMC Referral Service at 412-647-UPMC (8762) or 1-800-533-UPMC (8762). Select option 1.

UPMC is an equal opportunity employer. UPMC policy prohibits discrimination or harassment on the basis of race, color, religion, ancestry, national origin, age, sex, genetics, sexual orientation, marital status, familial status, disability, veteran status, or any other legally protected group status. Further, UPMC will continue to support and promote equal employment opportunity, human dignity, and racial, ethnic, and cultural diversity. This policy applies to admissions, employment, and access to and treatment in UPMC programs and activities. This commitment is made by UPMC in accordance with federal, state, and/or local laws and regulations.

Medical information made available on UPMC.com is not intended to be used as a substitute for professional medical advice, diagnosis, or treatment. You should not rely entirely on this information for your health care needs. Ask your own doctor or health care provider any specific medical questions that you have. Further, UPMC.com is not a tool to be used in the case of an emergency. If an emergency arises, you should seek appropriate emergency medical services.

For UPMC Mercy Patients: As a Catholic hospital, UPMC Mercy abides by the Ethical and Religious Directives for Catholic Health Care Services, as determined by the United States Conference of Catholic Bishops. As such, UPMC Mercy neither endorses nor provides medical practices and/or procedures that contradict the moral teachings of the Roman Catholic Church.

© UPMC
Pittsburgh, PA, USA UPMC.com