Validation of custom active markers for use with a high accuracy tracking system.
Boris Brun, Tom Williamson, Marco Domenico Caversaccio, Stefan Weber, Brett J. Bell · CURAC · 2013
The success of an image-guided surgical procedure is dependent on a number of factors; foremost among these is the accuracy with which the positions of surgical tools can be determined relative to the patient. This information can be obtained using a variety of methods however in practice almost all available navigation systems utilize optical tracking. This work presents the validation of custom active tracking markers in combination with a high accuracy tracking system. Two evaluation methodologies are described; a relative positioning test in which the markers are moved in a known pattern throughout the camera workspace examining the positioning accuracy, and a rotation test designed to determine the effects of rotation on the tracked position of the locator. Position testing revealed a mean accuracy 0.019±0.019 mm, with a maximum error of 0.103 mm; rotation testing revealed a maximum deviation of 0.049 mm when rotating about a known axis, through a trackable range of approximately 80°. A maximum angular error 0.096° was noted when rotating about a known axis.