A nuclear magnetic resonance (NMR) imaging method and apparatus is disclosed. The apparatus is an insertable probe consisting of a handle portion and an insertable portion. The probe has a NMR signal receiver disposed within the insertable portion and a reception frequency tuner which may be connected...http://www.google.de/patents/US5170789?utm_source=gb-gplus-sharePatent US5170789 - Insertable NMR coil probe
