Human Connectome Project
Scientists at Massachusetts General Hospital are pushing the technique to its limits with a purpose-built scanner. It is one of the most powerful scanners in the world. The scanner's magnets need 22MW (megawatts) of electricity  enough to power a nuclear submarine. It was specially built for this project "4 to 8 times as powerful as conventional systems, enabling imaging of human neuroanatomy with much greater sensitivity than is currently possible".