Movable MRIs exist, but they're trailer-sized: you not only need to move the magnet (probably a superconductor, which then needs usually needs cryogens to keep

Movable MRIs exist, but they're trailer-sized: you not only need to move the magnet (probably a superconductor, which then needs usually needs cryogens to keep it superconducting too), but all the shielding too.