Yeah, I think I remember something like 10-20k to refill the cooling on an MRI, and that is just topping it off as some is slowly lost. The helium is just used to cool it. Helium is helium, so no such thing as medical vs not. The cost to repair this thing is going to be absurd. They are making better machines now have little to no loss, but I don’t think those are super prevalent yet.
Do you have a
KitchenAidstand mixer or anything like that? Best thing I ever learned is making ice cream with dry ice. I just put the base in the mixer, start it with the paddle, and start putting in crushed up dry ice, one spoonful at a time. I managed to get dry ice in the little cubes or pellets, put it in a cloth sack, and then use a hammer or blunt object to break it up into small pieces.