Technical Program

Paper Detail

Paper:	FR-PM-PS1.8
Session:	Atlas and Model Based Image Segmentation
Time:	Friday, April 7, 13:30 - 14:50
Presentation:	Poster
Title:	Lateral Asymmetry in the Shape of Brain Ventricles in Control and Schizophrenia Groups
Authors:	James Graham; University of Manchester
	Kolawale Babalola; University of Manchester
	William Honer; University of British Columbia
	Donna Lang; University of British Columbia
	Lili Kopala; University of British Columbia
	Robert Vandorpe; Dalhousie University
Abstract:	We use point distribution models (PDMs) to investigate lateral asymmetries in the shape of brain ventricles between control and schizophrenia groups. Ventricle surfaces were extracted from T2-weighted MR images and PDMs generated using structural correspondences on the individual surfaces. Using paired linear discriminant analysis we calculate the vector in shape space that maximally separates the shapes of right and left ventricles in the group. The magnitude of the asymmetry is quantified by projection of the individual ventricle shapes onto this vector. We observe significant differences in the magnitude of the asymmetry in both schizophrenic and control groups. There is also a clear difference in the pattern of asymmetry. Male and female subgroups show different magnitudes and patterns of asymmetry, both in control and schizophrenic subjects.

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