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Published in:
2012 | OriginalPaper | Chapter
Optimization for Multi-Region Segmentation of Cardiac MRI
Authors : Johannes Ulén, Petter Strandmark, Fredrik Kahl
Published in: Statistical Atlases and Computational Models of the Heart. Imaging and Modelling Challenges
Publisher: Springer Berlin Heidelberg
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We introduce a new multi-region model for simultaneous segmentation of the left and right ventricles, myocardium and the left ventricular papillary muscles in MRI. The model enforces geometric constraints such as inclusion and exclusion between the regions, which makes it possible to correctly segment different regions even though the intensity distributions are identical. We efficiently optimize the model using Lagrangian duality which is faster and more memory efficient than current state of the art. As the optimization is based on global techniques, the resulting segmentations are independent of initialization. We evaluate our approach on two benchmarks with competitive results.