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MRI is used to image the breast tissue. Cosmetic implants are also well demonstrated. Implants can obscure some of the breast tissue on conventional x-ray mammography images. This is because x-rays used for mammographic imaging of the breasts cannot penetrate silicone or saline implants well enough to image the overlying or underlying breast tissue. MRI can see implants and breast tissue equally well. MRI is the imaging method of choice to evaluate breast implants, demonstrating small ruptures or leaks in silicone breast implants. MRI provides excellent spatial resolution (detail) and contrast resolution and enables the radiologist to clearly visualize implant condition.
In recent local studies breast MRI has shown to be an effective tool in detecting suspicious breast tissue changes in patients at high risk of developing breast cancer. Large studies have shown that both mammography and MRI are equally important in screening and that MRI does not remove the need for mammography screening.
The scan may need to be booked at a particular day in your menstrual cycle. You may need to cease HRT (hormone replacement therapy) at least 28 days prior to the scan. These preparations will be discussed when your appointment is made.
For most scans, intravenous contrast is required. A small needle will be put into a vein in your arm for the administration of contrast medium called gadolinium. The scans are taken with you lying prone (on your stomach) so that your breasts are positioned within a coil (a special piece of equipment) which measures the radio-frequency waves. Your breasts are gently compressed into position. After preliminary scans are taken, the contrast is injected and the scans are taken immediately. If you are being scanned because there is a concern that your implants are ruptured you will not need the injection of contrast medium as ruptures are easily visualized.
The time in the MRI room is approximately 30 to 40 minutes. After the examination you should be able to resume your normal activities.
If you know that you have a history of any allergies - please inform the technician before the examination.
Always bring with you any previous breast mammograms or ultrasound images.
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