A surgical navigation system for tracking a procedure relative to a patient is disclosed. The system can track a portion of the patient, an instrument, both, and both or either relative to image data, a coordinate system, an atlas, a morphed atlas, or combinations thereof. The system can include a minimally...http://www.google.com.au/patents/US7840253?utm_source=gb-gplus-sharePatent US7840253 - Method and apparatus for surgical navigation
