Magnetic particle imaging (MPI) is a tomographic imaging technique that measures the magnetic fields generated by magnetic particles in a tracer. Researchers at Philips Research have used the technique to achieve resolutions finer than one millimeter. Magnetic Particle Imaging has potential applications in medicine and material science. Recently, the first in-vivo results were published revealing structures of a beating mouse heart.
In comparison to the classic setup as a cave, the university of Lübeck in Germany is developing a single-sided MPI scanner. The single-sided MPI scanner could be used like a subsonic device.