[fabian2k]

The largest NMR spectrometer you can buy today uses high-temperature superconductors and classical ones, but it still cools everything down with liquid helium. As far as I understand you can push more current through the high temperature superconductors when you cool them down more.

NMR spectrometers work on essentially the same mechanism as MRIs, just in a very different form factor. It might even work for MRIs without helium because they have a much lower field (~3-6T) compared to the ~28T of the highest field NMR spectrometer.

The high-temperature superconductors are still pretty new for this field, it took a while to figure out manufacturing them on a scale and quality that could be used for these large magnets.

[cyberax]

> NMR spectrometers work on essentially the same mechanism as MRIs, just in a very different form factor.

That's a real understatement :)

A typical NMR spectrometer needs to hold a test tube, and an MRI machine kinda has to hold a whole human.