The potential side effects of magnetic and electric fields on human health remain a source of debate. In particular, the possible effects on an unborn baby are not well known. Any woman who is, or may be, pregnant should carefully discuss this issue with her physician and radiologist before undergoing a scan.
Chemical agents may be injected to improve the image or allow for the imaging of blood or other fluid flow during MRA. In rare cases, patients may be allergic to or intolerant of these agents, and should not receive them. If chemical agents are to be used, patients should discuss any concerns they have with their physician and radiologist.
As in other medical imaging techniques, obesity greatly interferes with the quality of MRI.
The machine makes a banging noise while it is working, which might be unpleasant.
Laying on your back for a prolonged period of time might cause some pain in your back. It could also cause in other areas from lying on an uncomfortable patient table. These issues are temporary, but it is worth noting for those with chronic pain in certain joints or areas.
The most frequently reported side effects of the MRI contrast gadolinium were hives and nausea.
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Women in the first 12 weeks of pregnancy should avoid MRI and the contrast medium. There are no known harmful effects to pregnant women and unborn babies. However, because it is a recently-developed technology, the long term effects of MRI are not known.
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