Standard hospital scanners have a spatial resolution of about 1 millimeter, covering about 10 000 neurons, and a time resolution of about a second. The INUMAC will be able to image an area of about 0.1 mm, or 1000 neurons, and see changes occurring as fast as one-tenth of a second, according to Pierre Védrine, director of the project at the French Alternative Energies and Atomic Energy Commission, in Paris
TIL. My applied friends in the area are mostly working with lab animals, so maybe they just weren't cautious enough with their own metallic items? Who knows.
http://spectrum.ieee.org/biomedical/imaging/the-worlds-most-powerful-mri-takes-shape