MRI uses quite a lot RF, the coils are tuned to the B0 field frequency, there's a TX as well as RX. Commonly TX freq as at 63.87Mhz (1.5T) or 127.74 MHz (3.0T).

MRI uses quite a lot RF, the coils are tuned to the B0 field frequency, there's a TX as well as RX. Commonly TX freq as at 63.87Mhz (1.5T) or 127.74 MHz (3.0T). While most of the workers are well shielded from the room, but people have to be extra careful to not microwave heat your patient to much (usually +1C hotter). But don't worry too much, there's a SAR limit on it. Most of the RF components, equipment, including our phones, are all strictly regulated by SAR (specific absorption rate). Each of them might be safe, but if you are having too many of them around you can be a problem (?).