The present invention pertains to a fiducial implant for the human body that is detectable by an imaging system. The invention is comprised of a first portion and a second portion. The first portion is configured to be detected by an imaging system when palce beneath the skin. The second portion is configured...http://www.google.de/patents/US5119817?utm_source=gb-gplus-sharePatent US5119817 - Apparatus for imaging the anatomy
