ComparativeIn VitroStudy of Contact-and Image-Based Rigid Registration for Computer-Aided Surgery

Ofri Sadowsky, Ziv Yaniv, Leo Joskowicz
2002 Journal of Computer-Aided Surgery  
We present an in -vitro study of rigid registration methods for computer -aided surgery. The goal of the study is t o empirically obtain accuracy measures under optimal laboratory conditions and to identify the weak links in the registration chain. Specifically, we investigate two common registration methods: contact based registration and image -based landmark registra tion. We establish a framework for comparing the accuracy of both methods and describe phantoms, protocols, and algorithms for
more » ... tool tip calibration, contact -based registration with an optical tracker ¡ fluoroscopic X -ray camera calibration, and fluoroscopi c X -ray image-based landmark registration. We report an average accuracy of 0.5mm (1.5mm maximum) and 2.75mm (3.4mm maximum) for contact -based and imagebased landmark registration, respectively. Based on our findings, we identify the camera calibration as being the main source of error in image -based landmark registration. We propose protocol improvements and algorithmic refinements to improve the accuracy of image-based landmark registration
doi:10.3109/10929080209146031 pmid:12454893 fatcat:fkq7v5cwvvhc7f3vrgdjakds7e