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3D Active Shape Model Segmentation with Nonlinear Shape Priors

Kirschner, Matthias and Becker, Meike and Wesarg, Stefan (2011):
3D Active Shape Model Segmentation with Nonlinear Shape Priors.
In: Lecture Notes in Computer Science (LNCS); 6892, pp. 492-499, Springer, Berlin; Heidelberg; New York, Medical Image Computing and Computer-Assisted Intervention - MICCAI 2011: Part II, [Conference or Workshop Item]

Abstract

The Active Shape Model (ASM) is a segmentation algorithm which uses a Statistical Shape Model (SSM) to constrain segmentations to 'plausible' shapes. This makes it possible to robustly segment organs with low contrast to adjacent structures. The standard SSM assumes that shapes are Gaussian distributed, which implies that unseen shapes can be expressed by linear combinations of the training shapes. Although this assumption does not always hold true, and several nonlinear SSMs have been proposed in the literature, virtually all applications in medical imaging use the linear SSM. In this work, we investigate 3D ASM segmentation with a nonlinear SSM based on Kernel PCA. We show that a recently published energy minimization approach for constraining shapes with a linear shape model extends to the nonlinear case, and overcomes shortcomings of previously published approaches. Our approach for nonlinear ASM segmentation is applied to vertebra segmentation and evaluated against the linear model.

Item Type: Conference or Workshop Item
Erschienen: 2011
Creators: Kirschner, Matthias and Becker, Meike and Wesarg, Stefan
Title: 3D Active Shape Model Segmentation with Nonlinear Shape Priors
Language: English
Abstract:

The Active Shape Model (ASM) is a segmentation algorithm which uses a Statistical Shape Model (SSM) to constrain segmentations to 'plausible' shapes. This makes it possible to robustly segment organs with low contrast to adjacent structures. The standard SSM assumes that shapes are Gaussian distributed, which implies that unseen shapes can be expressed by linear combinations of the training shapes. Although this assumption does not always hold true, and several nonlinear SSMs have been proposed in the literature, virtually all applications in medical imaging use the linear SSM. In this work, we investigate 3D ASM segmentation with a nonlinear SSM based on Kernel PCA. We show that a recently published energy minimization approach for constraining shapes with a linear shape model extends to the nonlinear case, and overcomes shortcomings of previously published approaches. Our approach for nonlinear ASM segmentation is applied to vertebra segmentation and evaluated against the linear model.

Series Name: Lecture Notes in Computer Science (LNCS); 6892
Publisher: Springer, Berlin; Heidelberg; New York
Uncontrolled Keywords: Forschungsgruppe Medical Computing (MECO), Statistical shape models (SSM), Active shape models (ASM), 3D Medical data, Segmentation, Kernel principal component analysis (KPCA)
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
Event Title: Medical Image Computing and Computer-Assisted Intervention - MICCAI 2011: Part II
Date Deposited: 12 Nov 2018 11:16
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