Calibration block for surgical fiducial marker arrays

A calibration block configured to facilitate the calibration of surgical fiducial marker arrays on separate medical devices, the calibration block comprising:

• a main body having a top face oriented upwards and multiple side faces oriented sideways, wherein the top face includes a reference divot configured to accept therein the tip of a separate surgical probe having a separate surgical probe fiducial marker array coupled thereto;
• a plurality of top surgical fiducial markers located at the top face;
• a plurality of side surgical fiducial markers located at two or more of the multiple side faces, wherein the plurality of top fiducial markers and the plurality of side fiducial markers combine to form a fixed asymmetrical positional arrangement of surgical fiducial markers configured to be referenced by a separate augmented reality system for calibrating the separate surgical fiducial marker array;
• and
• a plurality of screw openings located at the top face, wherein each of the plurality of screw openings is configured to accept therein a separate surgical screw coupled to a separate surgical screwdriver having a separate surgical screwdriver fiducial marker array coupled thereto.

A method of using a calibration device, the method comprising:

• coupling a first surgical screw to the tip of a surgical screwdriver having a surgical fiducial marker array coupled thereto;
• inserting the first surgical screw into a screw hole on a primary face of the calibration device while the first surgical screw is coupled to the tip of the surgical screwdriver;
• and
• calibrating the locations of a plurality of surgical screwdriver fiducial markers on the surgical fiducial marker array using an augmented reality calibration system that references a plurality of primary surgical fiducial markers located on the primary face of the calibration device and a plurality of secondary surgical fiducial markers located on one or more secondary faces of the calibration device.