Constrained surface evolutions for prostate and bladder segmentation in CT images

Authors:
Mikael Rousson;Ali Khamene;Mamadou Diallo;Juan Carlos Celi;Frank Sauer
Affiliations:
Imaging and Visulization Dept., Siemens Corporate Research, Princeton, NJ;Imaging and Visulization Dept., Siemens Corporate Research, Princeton, NJ;Imaging and Visulization Dept., Siemens Corporate Research, Princeton, NJ;Oncology Care Systems, Siemens Medical Solutions, Heidelberg, Germany;Imaging and Visulization Dept., Siemens Corporate Research, Princeton, NJ
Venue:
CVBIA'05 Proceedings of the First international conference on Computer Vision for Biomedical Image Applications
Year:
2005

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Abstract

We propose a Bayesian formulation for coupled surface evolutions and apply it to the segmentation of the prostate and the bladder in CT images. This is of great interest to the radiotherapy treatment process, where an accurate contouring of the prostate and its neighboring organs is needed. A purely data based approach fails, because the prostate boundary is only partially visible. To resolve this issue, we define a Bayesian framework to impose a shape constraint on the prostate, while coupling its extraction with that of the bladder. Constraining the segmentation process makes the extraction of both organs’ shapes more stable and more accurate. We present some qualitative and quantitative results on a few data sets, validating the performance of the approach.