title: Automated detection of fiducial screws from CT/DVT volume data for image-guided ENT surgery.
abstract: This paper presents an automated solution for precise detection of fiducial screws from three-dimensional (3D) Computerized Tomography (CT)/Digital Volume Tomography (DVT) data for image-guided ENT surgery. Unlike previously published solutions, we regard the detection of the fiducial screws from the CT/DVT volume data as a pose estimation problem. We thus developed a model-based solution. Starting from a user-supplied initialization, our solution detects the fiducial screws by iteratively matching a computer aided design (CAD) model of the fiducial screw to features extracted from the CT/DVT data. We validated our solution on one conventional CT dataset and on five DVT volume datasets, resulting in a total detection of 24 fiducial screws. Our experimental results indicate that the proposed solution achieves much higher reproducibility and precision than the manual detection. Further comparison shows that the proposed solution produces better results on the DVT dataset than on the conventional CT dataset.
authors.affiliation: Institute for Surgical Technology and Biomechanics, University of Bern, Switzerland. geuyan.zheng@ieee.org
authors.forename: Guoyan
authors.initials: G
authors.lastname: Zheng
authors.forename: Nicolas
authors.initials: N
authors.lastname: Gerber
authors.forename: Daniel
authors.initials: D
authors.lastname: Widmer
authors.forename: Christof
authors.initials: C
authors.lastname: Stieger
authors.forename: Marco
authors.initials: M
authors.lastname: Caversaccio
authors.forename: Lutz-Peter
authors.initials: LP
authors.lastname: Nolte
authors.forename: Stefan
authors.initials: S
authors.lastname: Weber
mesh_terms: D000465:Algorithms; D001331:Automation; D002102:Cadaver; D001330:Electronic Data Processing; D004867:Equipment Design; D006257:Head / Q000473:pathology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional; D016268:Internal Fixators; D015233:Models, Statistical; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*