There are Type 1 superconductors (the first that were discovered), and those have the magnetic properties that are more useful creating MRI type fields. There

There are Type 1 superconductors (the first that were discovered), and those have the magnetic properties that are more useful creating MRI type fields. There have been breakthroughs in Type 1 superconductors and I believe GE is making an MRI using Hydrogen at 20 Kelvin for the cryogen. Although I couldn't find much more than this patent in a quick search: https://www.google.com/patents/US20130104570 https://www.google.com/patents/US20130104570 ...and then there are Type 2 superconductors, of with the High Temperature (HTS) variety have been popular. There have been steady advancements in those materials, and someday there will be an MRI machine based on HTS materials. See the link to SuperPower below as well.