I’m the not dummy here, even if I ended up cutting it out myself, lol (xG3 in the back of the hand, don’t do this with a finger magnet - too much risk of nerve damage).
I strongly advise taking it out too, as Amal and many others have advised here and before. If it’s not a fingertip magnet, you really shouldn’t see an issue just removing it.
Not necessary. An MRI would almost never be needed for an unconscious person, and is contraindicated per Dr. Rohin (Medlife Crisis). I asked him if it was a concern and he not only confirmed it isn’t a worry, but he took an interest in it, too.