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It’s surprising how cages work. The MR one at work will leak if the door is open .5mm, it lets blue tooth and wifi through and some phone calls.

Works pretty well for MR at 3T (which is actually more like 2.89T) though - 125Mhz ish.



Anyone who says that "blocking" wifi is easy is someone who hasn't tried. Even very expensive professionally built cages don't "block", they attenuate. And modern wifi equipment is surprisingly good at working just fine with weak signals.




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