>My experience with MRIs comes mostly from having my head examined, >but I'm pretty sure that the room is a Faraday cage to contain the >substantial RF output, so it would be just about impossible to make a >cell phone work in there. You'd probably have to build a cell inside >the room (or use a simulator, as seen on "Myth Busters"). At the hospital where I work the MRI is indeed inside metal walls, which had the result that pages were not received on the floor below the MRI room. An MR exam room requires both radiofrequency and magnetic shielding. The RF shielding is to protect the scanner from stray radiofrequency emissions that mess up the MR signal and the magnetic shielding is to protect people (e.g. with pacemakers) and equipment from the effects of the magnetiic fields. The stronger the magnet the greater the demands for magnetic and radiofrequency shielding. most functional MR is now done on relatively high field (3Tesla) scanners. _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
