What is a breast MRI?
A breast MRI (magnetic resonance imaging (MRI) is a type of scan that uses a magnetic field and radio waves to produce detailed images of the tissues within the breast. An MRI is performed by a radiologist and is a safe procedure.
Why is a breast MRI needed?
A breast MRI is commonly used in the diagnosis and treatment of breast cancer. There are many stages at which an MRI may be helpful:
- If you have a family history of breast cancer (such as a mother or sister who had breast cancer at a relatively young age), regular breast cancer screening may be necessary. An MRI is a non-invasive way to perform this exam and avoid exposure to radiation from X-rays.
- An MRI can be used to take a closer look at breast abnormalities detected by another scan, such as a mammogram.
- If you have already been diagnosed with breast cancer, an MRI may be useful to examine any lumps more closely.
- MRIs can be useful during cancer treatment to monitor its effectiveness.
- If you have previously had surgery to remove a tumor, an MRI can examine the tumor site to see if it has healed or if the tumor has grown back.
Finally, a breast MRI may be useful in people who have silicone breast implants to check if one of the implants has ruptured.
A breast MRI is commonly used in the diagnosis and treatment of breast cancer.
What to expect from a breast MRI?
For more information on how MRI tests work, what to expect and how to prepare, see our page on MRI scanners.
Not everyone can have an MRI. If you are breastfeeding or pregnant, this can make the MRI images hard to read.
The test may take 30 to 60 minutes. The length of time depends on whether a contrast dye is used to highlight certain parts of the spine. If contrast dye is used, it will be given intravenously. This can help physicians understand the scan images by highlighting different tissues within the breasts. Contrast dye is usually safe, but there may be some risk if you have kidney problems. You should inform your physician of any pre-existing conditions before you have the IV.
In most MRIs you lie on your back, but in a breast MRI you lie face down on a platform designed to accommodate your breasts and help you lie still. It is important to let the radiologist know if you feel uncomfortable, because it is much easier to remain still during the scan when you can relax.