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Fast voxel-based 2D/3D registration algorithm using a volume rendering method based on the shear-warp factorization

By Jürgen Weese, Roland Göcke, Graeme P. Penney, Paul Desmedt, Thorsten M. Buzug and Heidrun Schumann


2D/3D registration makes it possible to use pre-operative CT scans during X-ray fluoroscopy guided interventions for navigation purposes. For this registration task a fast voxel-based method is presented, which uses a recently introduced similarity measure (pattern intensity). This measure is especially suitable for 2D/3D registration, because it is robust with respect to structures as, for instance, a stent visible in the X-ray fluoroscopy image but not in the CT scan. The method uses only a part of the CT scan for the generation of digitally reconstructed radiographs (DRRs) to accelerate their computation. Nevertheless, computation time is crucial for intra-operative application, because numerous DRRs must be computed. The suitability of different volume rendering methods for 2D/3D registration has been investigated therefore. A method based on the shear-warp factorization turned out to be especially suitable and builds the basis of the registration algorithm. The algorithm has been ..

Topics: image guided surgery, 2D/3D registration, volume rendering, similarity measure
Year: 1999
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