Merrimack Valley Health Services

MRI-Guided Breast Biopsy

Important Things to Know About MRI-Guided Breast Biopsy

Magnetic resonance imaging (MRI) Guided Breast Biopsy is less invasive than surgical biopsy and only requires local anesthetic to numb the biopsy site. The radiologist will remove a tissue sample under MRI guidance to be analyzed to determine if the growth is benign or cancerous.

MRI-Guided Breast Biopsy Patient Instructions:

Arrive 15 minutes early to complete paperwork. Inform your referring physician if you have ever experienced claustrophobia. If necessary, your doctor can prescribe a mild sedative before your appointment. If you receive medication, bring someone to drive you home.

  • If you take aspirin or another blood thinner, let us know ahead of time. You may be advised to stop three days before the procedure.
  • Wear a bra to your appointment. After the procedure, you may receive a cold pack to hold against the biopsy site.
  • You may want to have a relative or friend come with you to lend support and drive you home.

Additional Patient Instructions

  • Contact us to find out if you have any restrictions on what you can eat and drink before your appointment.
  • Take your regular medications prior to your exam.
  • Bring your insurance information, as well as any applicable diagnostic films.
  • Leave valuables at home. No metal objects can be worn during your scan (such as watches, jewelry, keys or cell phone).
  • You may be asked to wear a hospital gown or your own clothing if there are no metal snaps or zippers.

Notify our staff in advance if you:

  • Have implanted devices
  • Have any serious health problems
  • Have had any surgery within the last eight weeks
  • Have ever had surgery on your brain, ears, eyes or heart
  • Have metal in your eyes, or work with metals
  • Have a bone or joint replacement or any prosthesis
  • Are or may be pregnant or breastfeeding
  • Weigh more than 300 pounds


Whether you’re a patient or a referring provider, you’ll benefit from the unique breadth of technology and medical expertise we offer.

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