| CPC A61B 34/20 (2016.02) [A61B 6/463 (2013.01); A61B 6/547 (2013.01); A61B 6/582 (2013.01); A61B 34/25 (2016.02); G06T 7/70 (2017.01); A61B 6/022 (2013.01); A61B 2034/2055 (2016.02); A61B 2034/2057 (2016.02); A61B 2034/256 (2016.02); A61B 2090/3764 (2016.02)] | 11 Claims |
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1. A surgical navigation system for use with an x-ray imaging device configured to acquire an x-ray image of an anatomical structure at one of a plurality of angular positions relative to a direction toward center of Earth gravity, the system comprising:
a localizer unit comprising a tracking sensor and a gravity vector sensor, the tracking sensor and the gravity vector sensor mounted to the localizer unit, wherein the gravity vector sensor is configured to detect the direction toward center of Earth gravity regardless of an orientation of the tracking sensor;
a tracking device configured to be coupled to the x-ray imaging device so as to be movable with movement of the x-ray imaging device between the plurality of angular positions, the tracking device comprising a tracking element detectable by the tracking sensor;
a computer processor operatively coupled to the localizer unit; and
a display coupled to the computer processor, wherein the computer processor configured to implement an imaging routine comprising:
receiving tracking data from the tracking sensor and a gravity vector from the gravity vector sensor;
generating an image vector based on the tracking data with the image vector being indicative of the one of the plurality of angular positions at which the x-ray image was acquired;
determining an angle between the image vector and the gravity vector; and
assigning a first image identifier to the x-ray image based on the determined angle, the first image identifier configured to provide an indication of the one of the plurality of angular position at which the x-ray image was acquired,
wherein the system is configured to display the x-ray image with the first image identifier;
updating the x-ray image on the display with a second x-ray image on the display responsive to the second x-ray image being assigned a second image identifier the same as the first image identifier, the second image identifier based on a second determined angle between a second image vector being indicative of one of the plurality of angular positions at which the second x-ray image was acquired, and the gravity vector.
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