Magnetic field strength falls off with inverse square, so it shouldn't be an issue outside of the immediate MRI room. The helium risk to MEMS oscillators is rea

Magnetic field strength falls off with inverse square, so it shouldn't be an issue outside of the immediate MRI room. The helium risk to MEMS oscillators is real -- a former employer had an incident involving gaseous helium venting and a dozen bricked iPhones and watches.