According to The Center for Diagnostic Imaging, magnetic resonance imaging (MRI) is a form of digital medical imaging that uses a combination of a large magnet, radio waves, and a computer to produce detailed images of organs and structures within the body.

“A breast MRI is not a replacement for 3D mammography or ultrasound imaging but is a supplemental tool that may be used when screening high-risk patients, determining the extent of cancer after diagnosis or evaluating hard-to-assess abnormalities seen in mammography,” remarked Eric Godreau, M.D., and radiologist at the Center for Diagnostic Imaging (a diagnostic imaging center in Miami).

How does an MRI work?

The MRI machine is a large, cylindrical (tube-shaped) machine that creates a strong magnetic field around the patient. The magnetic field, along with radio waves, alters the hydrogen atoms’ natural alignment in the body. Computers are then used to form a two-dimensional (2D) image of a body structure or organ based on the activity of the hydrogen atoms.

How does a breast MRI work?

For a breast MRI, a woman usually lies face down with her breasts positioned through openings in the table. In order to check breast positioning, the technologist watches the MRI through a window while monitoring for any potential movement.

A breast MRI usually requires the use of contrast that is injected into a vein in the arm before or during the procedure. The dye may help create clearer images that outline abnormalities more easily.

“MRIs are largely painless. Some patients are discomforted by the enclosed space, having to stay still and, rarely, by reaction to the contrast material,” Godreau said. “However, an MRI can offer valuable information about the health of the breast that cannot be obtained with other diagnostic imaging options.”

All of CDI Miami’s examinations are conducted by board-certified radiologists. “The result of your breast MRI will be sent to your referring physician as soon as it is interpreted,” stipulated Godreau. “It is the patient's responsibility to contact their referring physician to discuss the results of their examination and ask for further recommendations."