Comment by lostlogin

> There are NO alternatives.

We use a lot in our MR scanners.

The tech is changing and magnets are using far far less.

Super-conduction at higher temperatures has made progress too.

So while you are right that nothing else stays liquid at those temps, we won’t be needing nearly as much helium in radiology in the next few years.

The new generation use something like 700ml of helium, where the standard was hundreds of litres. https://magneticsmag.com/siemens-healthineers-gets-fda-clear...