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

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A. Besbes, N. Komodakis, B. Glocker, G. Tziritas, N. Paragios
4D Ventricular Segmentation and Wall Motion Estimation Using Efficient Discrete Optimization
3rd International Symposium in Visual Computing, (ISVC), Lake Tahoe, Nevada/California, USA, November 26-28 2007. (bib)

In this paper we propose a novel approach to ventricular motion estimation and segmentation. Our method is based on a MRF forumlation where an optimal intensity-based separation between the endocardium and the rest of the cardiac volume is to be determined. Such a term is defined in the spatiotemporal domain, where the ventricular wall motion is introduced to account for correspondences between the consecutive segmentation maps. The estimation of the deformations is done through a continuous deformation field (FFD) where the displacements of the control points are determined using a discrete labeling approach. Principles from linear programming and in particular the Primal/Dual Schema is used to recover the optimal solution in both spaces. Promising experimental results obtained on 13 MR spatiotemporal data sets demonstrate the potentials of our method.
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