Siemens Healthineers Magnet Technology, Eynsham, Oxfordshire

A major share of the world's MRI superconducting magnets comes out of this single Oxfordshire site, which combines two upstream dependencies: niobium-titanium wire (niobium almost exclusively Brazilian) and liquid helium. Every helium shortage translates into direct strain on medical imaging. "Helium-free" magnets still equip only a minority of the installed base.