I don’t even know the right kind of flair for this question- tech? physics? biology?
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eta: thank you everyone! This is all very helpful. I was in the big MRI tube yesterday and had no idea how the technology actually worked. So cool!
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MRIs work by using very strong magnetic fields to manipulate the protons in your body, and based on how the electrons respond to the magnetic field we can differentiate between different substances. This is why MRIs can do more than X-rays, which can only differentiate between bone and not bone (for the most part): an MRI can tell the difference between fat and water and other different fluids. I’d highly recommend checking out [This Video](https://youtu.be/NlYXqRG7lus?si=vxhgcwefcZo8bnbt) from Real Engineering that does a fabulous job explaining how they work!
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