Are the eddy currents induced by MRIs too insufficient to see rapid temperature increase? I understand MRIs are incredibly attracted to ferrous material, but what happens to non-ferrous metals in the body?
In: Physics
Had to look up the [answer](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6369045/), but yeah, it seems that eddy currents generally aren’t sufficient to cause sufficient heating concerns in most cases. (Although a few articles did have warnings)
They don’t give many details (nor does the citation), but it seems to be a combination of two things:
a) implants often don’t form a nice large conducting path. Interruptions in the path can reduce eddy current effects
b) the body in general (or saline solution) is generally pretty good at transferring heat. It’s actually an issue in things like heat treatments, things like blood dissipate local heat pretty effectively, especially near large arteries and the like.
Neat question, since it seems that contact burns are actually fairly common. From what i found, that’s because things like outside wires often do form large conducting paths that are nice for eddy currents, and are also fairly thermally isolated (being in air)
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