title: Generalized fuzzy clustering for segmentation of multi-spectral magnetic resonance images.
abstract: An integrated approach for multi-spectral segmentation of MR images is presented. This method is based on the fuzzy c-means (FCM) and includes bias field correction and contextual constraints over spatial intensity distribution and accounts for the non-spherical cluster's shape in the feature space. The bias field is modeled as a linear combination of smooth polynomial basis functions for fast computation in the clustering iterations. Regularization terms for the neighborhood continuity of intensity are added into the FCM cost functions. To reduce the computational complexity, the contextual regularizations are separated from the clustering iterations. Since the feature space is not isotropic, distance measure adopted in Gustafson-Kessel (G-K) algorithm is used instead of the Euclidean distance, to account for the non-spherical shape of the clusters in the feature space. These algorithms are quantitatively evaluated on MR brain images using the similarity measures.
authors.affiliation: Department of Diagnostic and Interventional Imaging, University of Texas Medical School, Houston, TX 77030, USA. Renjie.He@uth.tmc.edu
authors.forename: Renjie
authors.initials: R
authors.lastname: He
authors.forename: Sushmita
authors.initials: S
authors.lastname: Datta
authors.forename: Balasrinivasa Rao
authors.initials: BR
authors.lastname: Sajja
authors.forename: Ponnada A
authors.initials: PA
authors.lastname: Narayana
mesh_terms: D000465:Algorithms; D001921:Brain; D016000:Cluster Analysis; D017143:Fuzzy Logic; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity