MRI fuzzy segmentation of brain tissue using neighborhood attraction with neural-network optimization

Authors:
Shan Shen;W. Sandham;M. Granat;A. Sterr
Affiliations:
Dept. of Psychol., Univ. of Surrey, Guildford, UK;-;-;-
Venue:
IEEE Transactions on Information Technology in Biomedicine
Year:
2005

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Abstract

Image segmentation is an indispensable process in the visualization of human tissues, particularly during clinical analysis of magnetic resonance (MR) images. Unfortunately, MR images always contain a significant amount of noise caused by operator performance, equipment, and the environment, which can lead to serious inaccuracies with segmentation. A robust segmentation technique based on an extension to the traditional fuzzy c-means (FCM) clustering algorithm is proposed in this paper. A neighborhood attraction, which is dependent on the relative location and features of neighboring pixels, is shown to improve the segmentation performance dramatically. The degree of attraction is optimized by a neural-network model. Simulated and real brain MR images with different noise levels are segmented to demonstrate the superiority of the proposed technique compared to other FCM-based methods. This segmentation method is a key component of an MR image-based classification system for brain tumors, currently being developed.