Optical camera calibration for cas navigation

Details Optical camera calibration for cas navigation Optical camera calibration for cas navigation

A - Human Necessities

61

B

A61B 19/00 (2006.01)

Patent

CA 2679903

A navigation system for tracking an object during surgery, comprises markers adapted to be connected to an object in a known relation. An optical camera detects a light signal from the at least one marker, the optical camera generating tracking data associated with a position of the markers from the light signal. A transparent shield is positioned between the optical camera and the markers during surgery to allow the optical camera to be within the sterile field. Calibration data is associated with an effect of the shield on the light signal passing therethrough to be detected by the optical camera. A position and orientation calculator calculates a position and/or orientation of the object as a function of the tracking data, of the calibration data, and of the known relation between the object and the markers. A method is provided for tracking an object in computer-assisted surgery.

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