MR is a diagnostic test that uses a combination of a large magnet, radio frequencies and a computer to produce detailed images of organs and structures within the body. The MR machine is a large, tube-shaped machine that creates a strong magnetic field around the patient.
This magnetic field, along with a radio frequency, alters the alignment of hydrogen atoms in the body. Computers are then used to form two-dimensional images of fetal organs based on the response of the hydrogen atoms. No radiation is used and, based on years of experience, there are no known harmful effects.
Family members and partners are welcome to accompany the mother to the procedure room. The MR procedure takes 30 minutes to an hour. You are allowed to eat and drink prior to testing although, as with ultrasound, we recommend avoiding caffeine because it can make the baby more active during assessment. Also, a "full bladder" is not required and this test is safe for you your baby.
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