Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Breast Cancer Health Center

Select An Article

Breast Cancer and MRI

Font Size

Breast MRI (magnetic resonance imaging) is a test that should not be used to distinguish between benign (noncancerous) and malignant (cancerous) areas, in lieu of a breast biopsy. Due to false positive results, performing this test may increase the number of breastbiopsies that need to be performed. It is not appropriate to utilize breast MRI to evaluate a suspicious breast mass, or to follow these breast masses over time. Although MRI may detect tumors in dense breast tissue, the presence of dense breast tissue is not a reason to have a breast MRI scan. Breast MRI scanning cannot detect tiny specks of calcium (known as microcalcifications), which account for half of the cancers detected by mammography.

Talk to your doctor about whether you should have an MRI of the breasts.

Recommended Related to Breast Cancer

Me and the Girls: Tammy Joyner

WebMD senior writer Miranda Hitti interviewed breast cancer survivors as part of a series for Breast Cancer Awareness Month. The series, called “Me & the Girls,” explores the personal stories of these women after they were diagnosed with breast cancer. Breast cancer survivor Tammy Joyner, 49, lives in the Atlanta area. When Joyner was 45 years old, she went to see her gynecologist after noticing some breast changes -- aches and soreness that she wasn't used to. "I said, 'Something's...

Read the Me and the Girls: Tammy Joyner article > >

Is the Breast MRI Test Safe?

A breast MRI is safe. The test poses no risk to the average patient if appropriate safety guidelines are followed.

People who have had heart surgery and people with the following medical devices can be safely examined with MRI:

  • Surgical clips or sutures
  • Artificial joints
  • Staples
  • Most heart valve replacements
  • Disconnected medication pumps
  • Vena cava filters
  • Brain shunt tubes for hydrocephalus

Some conditions may make an MRI exam inadvisable. Tell your doctor if you have any of the following conditions:

  • Heart pacemaker
  • Cerebral aneurysm clip (metal clip on a blood vessel in the brain)
  • Implanted insulin pump (for treatment of diabetes), narcotics pump (for pain medication), or implanted nerve stimulators ("TENS") for back pain
  • Metal in the eye or eye socket
  • Cochlear (ear) implant for hearing impairment
  • Implanted spine stabilization rods
  • Severe lung disease
  • Uncontrolled gastroesophageal reflux (a condition causing severe heartburn)

In addition, tell your doctor if you:

  • Are pregnant
  • Weigh more than 300 pounds
  • Are not able to lie on your back for 30 to 60 minutes
  • Have claustrophobia (fear of closed or narrow spaces)

How Long Is the Breast MRI Test?

Allow 1 1/2 hours for your breast MRI exam. In most cases, the procedure takes 45 to 60 minutes, during which time several dozen images are obtained.

Next Article:

Today on WebMD

Breast Cancer Overview
From self-exams and biopsies to reconstruction, we’ve got you covered.
Dealing with breast cancer
Get answers to your questions.
woman having mammogram
Experts don’t agree on all fronts, but you can be your own advocate.
woman undergoing breast cancer test
Many women worry. But the truth? Most abnormalities aren’t breast cancer.
Breast Cancer Treatments Improving
Resolved To Quit Smoking
Woman getting mammogram
Screening Tests for Women
ovarian cancer overview slideshow
serious woman
what is your cancer risk
10 Ways to Revitalize Slideshow