A non-invasive method for determining the articular point of a knee joint is disclosed. The method uses a surgical navigation system having stereoscopic cameras which track the positions of infrared emitting or reflecting markers attached to leg portions on either side of the knee joint. A movable marker...http://www.google.de/patents/US7780677?utm_source=gb-gplus-sharePatent US7780677 - Method of determining the position of the articular point of a joint
