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Type: Artigo de periódico
Title: Brain tissue MR-image segmentation via optimum-path forest clustering
Author: Cappabianco, FAM
Falcao, AX
Yasuda, CL
Udupa, JK
Abstract: We present an accurate and fast approach for MR-image segmentation of brain tissues, that is robust to anatomical variations and takes an average of less than 1 min for completion on modern PCs. The method first corrects voxel values in the brain based on local estimations of the white-matter intensities. This strategy is inspired by other works, but it is simple, fast, and very effective. Tissue classification exploits a recent clustering approach based on the motion of optimum-path forest (OPF), which can find natural groups such that the absolute majority of voxels in each group belongs to the same class. First, a small random set of brain voxels is used for OPF clustering. Cluster labels are propagated to the remaining voxels, and then class labels are assigned to each group. The experiments used several datasets from three protocols (involving normal subjects, phantoms, and patients), two state-of-the-art approaches, and a novel methodology which finds the best choice of parameters for each method within the operational range of these parameters using a training dataset. The proposed method outperformed the compared approaches in speed, accuracy, and robustness. (C) 2012 Elsevier Inc. All rights reserved.
Subject: Brain tissue segmentation
Field inhomogeneity/bias correction
Magnetic resonance images
Graph-based methods
Medical image analysis
Segmentation evaluation
Image clustering
Country: EUA
Editor: Academic Press Inc Elsevier Science
Citation: Computer Vision And Image Understanding. Academic Press Inc Elsevier Science, v. 116, n. 10, n. 1047, n. 1059, 2012.
Rights: fechado
Identifier DOI: 10.1016/j.cviu.2012.06.002
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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