It's been awhile since I've paid attention to the field, so apologies if I get this wrong. I was under the impression that cuprate superconductors were unsuitab

It's been awhile since I've paid attention to the field, so apologies if I get this wrong. I was under the impression that cuprate superconductors were unsuitable for use in MRI magnets because they only superconduct across clusters of microdomains, making it impossible (at least with current technology) to generate the large, strong, and uniform field necessary for the application. There seems to be ongoing research into producing suitable magnets with cuprates, but I don't know if the problem has been solved yet. In any case, there are no commercially available MRI machines that use cuprate superconductors.