Summary: Use of a Biocompatible Fiducial Marker in Evaluating
the Accuracy of CT Image Registration
Randy Ellis, Ph.D.
Søren Toksvig-Larsen, M.D.
Maurilio Marcacci, M.D.
Davide Caramella, M.D.£ Marco Fadda, Eng.
¤ Department of Computing and Information Science, Queen's University at Kingston, Ontario, Canada
Department of Orthopædic Surgery, University Hospital, Lund, Sweden
Biomechanics Laboratory, Rizzoli Orthopædics Institute, Bologna, Italy
§ Department of Radiology, University of Pisa, Pisa, Italy
Rationale and Objectives. Accurate registration of Computed Tomography images to the patient is crucial for
computer-assisted surgery. Markers used in Roentgen Stereogrammetric Analysis can be located in a CT scan
using a novel approach, and can also be located physically. RSA data act as "ground truth" for the 3D marker