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Proceedings Paper

Fast intra-operative non-linear registration of 3D-CT to tracked, selected 2D-ultrasound slices
Author(s): Janine Olesch; Björn Beuthien; Stefan Heldmann; Nils Papenberg; Bernd Fischer
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Paper Abstract

In navigated liver surgery it is an important task to align intra-operative data to pre-operative planning data. This work describes a method to register pre-operative 3D-CT-data to tracked intra-operative 2D US-slices. Instead of reconstructing a 3D-volume out of the two-dimensional US-slice sequence we directly apply the registration scheme to the 2D-slices. The advantage of this approach is manyfold. We circumvent the time consuming compounding process, we use only known information, and the complexity of the scheme reduces drastically. As the liver is a non-rigid organ, we apply non-linear techniques to take care of deformations occurring during the intervention. During the surgery, computing time is a crucial issue. As the complexity of the scheme is proportional to the number of acquired slices, we devise a scheme which starts out by selecting a few "key-slices" to be used in the non-linear registration scheme. This step is followed by multi-level/multi-scale strategies and fast optimization techniques. In this abstract we briefly describe the new method and show first convincing results.

Paper Details

Date Published: 2 March 2011
PDF: 6 pages
Proc. SPIE 7964, Medical Imaging 2011: Visualization, Image-Guided Procedures, and Modeling, 79642R (2 March 2011); doi: 10.1117/12.878105
Show Author Affiliations
Janine Olesch, Univ. of Lübeck (Germany)
Fraunhofer MEVIS (Germany)
Björn Beuthien, Univ. of Lübeck (Germany)
Fraunhofer MEVIS (Germany)
Stefan Heldmann, Univ. of Lübeck (Germany)
Fraunhofer MEVIS (Germany)
Nils Papenberg, Univ. of Lübeck (Germany)
Fraunhofer MEVIS (Germany)
Bernd Fischer, Univ. of Lübeck (Germany)
Fraunhofer MEVIS (Germany)


Published in SPIE Proceedings Vol. 7964:
Medical Imaging 2011: Visualization, Image-Guided Procedures, and Modeling
Kenneth H. Wong; David R. Holmes, Editor(s)

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