What does this mean for the safety of MRI’s, magnetic resonance imaging that they do in hospitals? They give you a quiz regarding having metal in your body. They also ask if you have mercury fillings which older folks do, yet they say it’s no big deal. Then why are they asking?

So now it turns out we all have microscopic metallic magnets in our brains. An MRI can’t possibly be safe for our brains. One more tech thing off the charts.

https://eos.org/articles/human-brains-have-tiny-bits-of-magnetic-material