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Breast Magnetic Resonance Imaging (MRI)

Breast magnetic resonance imaging (MRI) uses magnets and radio waves to produce detailed 2-D and 3-D images of the breast. It is considered very safe. This is a non-invasive procedure, which does not involve radiation.

Breast MRI services are offered at our General Site (4001 Leslie Street).

Preparing for your MRI

What to expect:

  • Our MRI technologists will introduce themselves and bring you into a private consultation room to go through some MRI safety questions and explain the procedure.
  • If you have a pacemaker or programmable shunt, an MRI cannot be done.
  • If you have an implanted device, please provide this information before arriving for your appointment:

1. Make and model of implant.

2. Manufacturer of implant.

3. Date of surgery for the implant.

  • Examples of implanted devices include: aneurysm clips, heart valves, breast tissue expander, cochlear implants, eye implants (with the exception of replaced intraocular lenses), stents, stimulator devices, porta catheter or any type of pump which may be implanted).
  • If you have worked with, or around metal, and had an injury to your eyes with metal you will need to have X-rays of the eyes prior to your MRI.
  • You will be asked to remove all clothing except underwear, socks and shoes. You will be given a patient gown and pants to put on.
  • You will be asked to remove anything metallic, such as jewellery, belts, earrings or zippers. It is strongly recommended that you do not bring any valuables with you because you will need to remove and place all jewellery in a patient locker.
  • Before the scan begins the technologist will give you ear plugs to reduce the noise that is created by the MRI.
  • During the MRI, you will need to expose your breasts and lie on your stomach.
  • As the MRI begins you will hear a loud thumping sound.
  • You will have a contrast dye injected into your arm near the end of the MRI to help with the clarity of the images. Although rare, some people have temporary discomfort during this infusion. You will be given a call bell to alert the technologist if you are not feeling well.
  • Your examination is expected to last 45 minutes.

What to wear

  • You will be asked to remove all clothing except underwear, socks and shoes and you will be given a patient gown and pants to put on.

Questions for your doctor

  • When and how will I receive my results?

Please contact the patient navigator if you have any questions or concerns regarding the procedure.

Learn more about MRI from: