Last I checked the MRI risk seemed low due to it's placement, shape, and the minimal strength of the magnet. Do you have any specific concerns?

PS: What if I need an MRI?

Originally it was thought that the magnets would always rip out of the skin and attach themselves to the MRI. However, we now know of a few people who have the magnets have gone through MRIs and this did not happen. One person reported that the magnet just vibrated very strongly. Another person reported that the techs shielded his hand, as they would with someone who had shrapnel or other implants. However, there are several different types of MRIs, so we can make no guarantee of what will happen during your MRI, so you must discuss it with the technician. It is likely that they will give you a hard time about it, so you should be prepared for this and for any possible risks to yourself. It’s also possible that the MRI might demagnetize your magnet.

http://www.stevehaworth.com/wordpress/index.php/welcome-from...