Computer aided surgery : official journal of the International Society for Computer Aided Surgery
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Comput. Aided Surg. · May 2008
Comparative StudyNavigated pedicle screw placement: experimental comparison between CT- and 3D fluoroscopy-based techniques.
Even with CT-based navigation, the misplacement rate for pedicle screws is reported to be as high as 10%. Using fluoroscopy-based 3D navigation, misplacement rates of 1.7 to 6% occur. The purpose of this study was to compare the accuracy of CT-based and Iso-C-based navigation in an experimental context. ⋯ The overall image-to-reality accuracy for CT- and Iso-C-based navigation was assessed in the described experimental setup. An apparent tendency towards higher accuracy with Iso-C-based navigation was evaluated; however, the differences were not significant.