CPC A61B 34/20 (2016.02) [A61B 2034/2051 (2016.02); A61B 2034/2055 (2016.02); A61B 2034/2065 (2016.02); A61B 2034/2072 (2016.02); A61B 2034/2074 (2016.02); A61B 2090/363 (2016.02); A61B 2090/3916 (2016.02)] | 10 Claims |
3. A method of reducing error in a navigated surgical system, the method comprising:
affixing at least one marked pin to a bone to be tracked, the marked pin having an optical grid-based tracking pattern varying in both a longitudinal direction and a latitudinal direction;
disposing a tracking sleeve onto each marked pin, the tracking sleeve including an internal tracking sensor and a plurality of external location trackers;
detecting position information from the internal tracking sensor by detecting grid lines of varying density, in at least one of the longitudinal direction and the latitudinal direction;
detecting a position of the tracking sleeve from the plurality of external location trackers; and
determining, based on the position information, whether any relative movement between the position of the tracking sleeve and the bone has occurred.
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