Since its development in the mid 1970s, Magnetic Resonance Imaging, or MRI, has grown into a mainstream diagnostic imaging tool used in a wide variety of conditions. The unique ability of MRI to demonstrate the anatomy, and more recently the function of soft tissues in the body, continues to find new application in patient care. It is not surprising, given the widespread application of MRI, that the occasional myth should find its way into the latest TV medical drama, Web page or even physician/patient discussions. The following are several of the more common myths.
Myth: I can’t have an MRI because I have had a previous joint replacement.
Reality: Because the MRI uses a powerful magnet, it is important to keep metallic objects that are attracted to the magnetic field out of the scanning area. Due to the strength of the MRI magnet, even a small metallic object such as a paper clip, can have substantial force as it is drawn into the magnet, and could cause injury if the object struck someone inside the MRI scanner.
complete article at Penn State Live
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