title: Segmentation of cortical MS lesions on MRI using automated laminar profile shape analysis.
abstract: Cortical multiple sclerosis lesions are difficult to detect in magnetic resonance images due to poor contrast with surrounding grey matter, spatial variation in healthy grey matter and partial volume effects. We propose using an observer-independent laminar profile-based parcellation method to detect cortical lesions. Following cortical surface extraction, profiles are extended from the white matter surface to the grey matter surface. The cortex is parcellated according to profile intensity and shape features using a k-means classifier. The method is applied to a high-resolution quantitative magnetic resonance data set from a fixed post mortem multiple sclerosis brain, and validated using histology.
authors.affiliation: McConnell Brain Imaging Centre, Montreal Neurological Institute, Canada.
authors.forename: Christine L
authors.initials: CL
authors.lastname: Tardif
authors.forename: D Louis
authors.initials: DL
authors.lastname: Collins
authors.forename: Simon F
authors.initials: SF
authors.lastname: Eskildsen
authors.forename: John B
authors.initials: JB
authors.lastname: Richardson
authors.forename: G Bruce
authors.initials: GB
authors.lastname: Pike
mesh_terms: D000368:Aged; D000465:Algorithms; D002540:Cerebral Cortex / Q000473:pathology*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009103:Multiple Sclerosis / Q000473:pathology*; D009413:Nerve Fibers, Myelinated / Q000473:pathology*; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity