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Proceedings Paper

Shape-model-based adaptation of 3D deformable meshes for segmentation of medical images
Author(s): Vladimir Pekar; Michael R. Kaus; Cristian Lorenz; Steven Lobregt; Roel Truyen; Juergen Weese
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Paper Abstract

Segmentation methods based on adaptation of deformable models have found numerous applications in medical image analysis. Many efforts have been made in the recent years to improve their robustness and reliability. In particular, increasingly more methods use a priori information about the shape of the anatomical structure to be segmented. This reduces the risk of the model being attracted to false features in the image and, as a consequence, makes the need of close initialization, which remains the principal limitation of elastically deformable models, less crucial for the segmentation quality. In this paper, we present a novel segmentation approach which uses a 3D anatomical statistical shape model to initialize the adaptation process of a deformable model represented by a triangular mesh. As the first step, the anatomical shape model is parametrically fitted to the structure of interest in the image. The result of this global adaptation is used to initialize the local mesh refinement based on an energy minimization. We applied our approach to segment spine vertebrae in CT datasets. The segmentation quality was quantitatively assessed for 6 vertebrae, from 2 datasets, by computing the mean and maximum distance between the adapted mesh and a manually segmented reference shape. The results of the study show that the presented method is a promising approach for segmentation of complex anatomical structures in medical images.

Paper Details

Date Published: 3 July 2001
PDF: 9 pages
Proc. SPIE 4322, Medical Imaging 2001: Image Processing, (3 July 2001); doi: 10.1117/12.430973
Show Author Affiliations
Vladimir Pekar, Philips Research Labs. and Medical Univ. Luebeck (Germany)
Michael R. Kaus, Philips Research Labs. (Germany)
Cristian Lorenz, Philips Research Labs. (Germany)
Steven Lobregt, Philips Medical Systems Nederland (Netherlands)
Roel Truyen, Philips Medical Systems Nederland (Netherlands)
Juergen Weese, Philips Research Labs. (Germany)

Published in SPIE Proceedings Vol. 4322:
Medical Imaging 2001: Image Processing
Milan Sonka; Kenneth M. Hanson, Editor(s)

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