Tissue segmentation on MR images of the brain by possibilistic clustering on a 3D wavelet representation

An algorithm for the segmentation of a single sequence of three-dimensional magnetic resonance (MR) images into cerebrospinal fluid, gray matter, and white matter classes is proposed, This new method is a possibilistic cluste ring algorithm using the fuzzy theory as frame and the wavelet coefficients of the voxels as features to be clustered, Fuzzy logic models the uncertai nty and Imprecision inherent in NIR images of the brain, while the wavelet representation allows for both spatial and textural information. The proced ure Is fast, unsupervised, and totally independent of any statistical assum ptions. The method is tested on a phantom Image, then applied to normal and Alzheimer's brains, and finally compared with another classic brain tissue segmentation method, affording a relevant classification of voxels into th e different tissue classes, (C) 2000 Wiley-Mss, Inc.