[ixf]

There are practical issues there. Liquid helium is relatively expensive and scarce, magnetic fields from the machine by definition need to be high to get good results, and to throw more fun into the mix you need to stop external radio interference from getting at the machine. Could you get the cost down to "specialised doctor's office" levels? Maaaaybe. Does AI have a role to play in that? Not one bit.

[hhmc]

Are there alternative fluids to liquid helium that could be used for cooling the magnets?

[sxg]

Liquid nitrogen is one alternative. Some further work is being done on room temperature superconductors, which obviates the need for any kind of cooling.