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MRI machines don't explode and send shrapnel everywhere lmao.
The quench button is used if a person is pinned by a ferrous object, or if there's a large fire in the room and firefighters need to get in the room.
The electrical E-stop button is used if the equipment is on fire, or if there's flooding.
MRI machines do explode and send shrapnel everywhere. Emergency stopping them causes the helium that's trapped in the part that rotates the magnets to become a gas, then expand as the magnets superheat. In some cases, this causes an understandable explosion.
Seriously happened once already this year https://healthimaging.com/topics/medical-imaging/magnetic-resonance-imaging-mri/mri-explosion-leaves-3-injured-including-2-hospital-staffers , the cop is lucky.
The magnet doesn't rotate like a CT. But you're right that there is a vessel with supercooled helium.
But that's the first time i've ever heard of this... It's a philips, makes sense.
They're supposed to be designed such that it is impossible. Looks like there was a major recall. Because again, that's something that should never happen.
https://www.auntminnie.com/clinical-news/mri/article/15682270/mri-scanner-explosion-in-south-africa-injures-3
https://www.auntminnie.com/clinical-news/mri/article/15588232/mri-magnet-explosions-warrant-improved-venting-and-inspections
https://awesomejelly.com/mri-machine-explodes-into-a-million-pieces-due-to-pressure-build-up/
https://www.medtechdive.com/news/philips-mri-recall-explosion-risk/703309/
Just a small handful from a very fast search. Feel free to look for more with photos of the damage.