Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

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2D-3D Registration of Vascular Images Towards 3D-Guided Catheter Interventions

Angiographic imaging is a widely used monitoring tool for minimally invasive vascular treatment and pathology access. Especially in deforming abdominal areas, the registration of pre- and intraoperative image data is still an unsolved problem, but important in several aspects. In particular, treatment time and radiation exposure to patient and physician can be significantly reduced with the resulting 2D-3D data fusion. The focus of this work is to provide methods for the registration of 2D vascular images acquired by a stationary C-arm to preoperative 3D angiographic Computed Tomography (CT) volumes, in order to improve the workflow of catheterized liver tumor treatments. Fast and robust vessel segmentation techniques are used to prepare the necessary graph data structures for a successful alignment. Here, we introduce restricted correspondence selection and iterative feature space correction to drive the proposed rigid-body algorithms to global and accurate solutions. Moreover, it is shown for the first time that the assignment of natural constraints on vessel structures allows for a successful recovery of a 3D non-rigid transformation despite a single-view scenario. Based on these results, novel volumetric visualization and roadmapping techniques are developed in order to resolve interventional problems of reduced depth perception, blind navigation, and motion blur.

Title: Dissertation Defense: 2D-3D Registration of Vascular Images
Date: 9 April 2008
Location: 02.09.023 (12:00)
Abstract: CAMP's research assistant Martin Groher is defending his dissertation. The topic of his thesis is '2D-3D Registration of Vascular Images Towards 3D-Guided Catheter Interventions'.
Imageurl: Spainscholarship2007?rev=1.3&filename=gradhat_small.png
Type: News

Edit | Attach | Refresh | Diffs | More | Revision r1.3 - 28 Mar 2008 - 09:05 - MartinGroher

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