No, it's pretty much all helium for clinical work.
Short of a quench (catastrophic heating, effectively) the most modern units hardly lose any, and often need less in the first place. An old machine might cost you near 6fig/year in helium refill, especially if out of spec. Some new magnets don't typically need any in a give year.
Short of a quench (catastrophic heating, effectively) the most modern units hardly lose any, and often need less in the first place. An old machine might cost you near 6fig/year in helium refill, especially if out of spec. Some new magnets don't typically need any in a give year.