An apparatus for measuring and fixing the three-dimensional location of medical instrument that can be easily placed at a desired location by a user. In addition, a medical apparatus for measuring the three-dimensional locations of an apparatus fixed at an end portion of a cancer and an external apparatus...http://www.google.de/patents/US7020542?utm_source=gb-gplus-sharePatent US7020542 - Apparatus for measuring and fixing the three-dimensional location of medical instrument
