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A factor analytic approach to structural characterization [brain MRI application]

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3 Author(s)
Machado, A.M.C. ; Dept. of Comput. Sci., Pontifical Catholic Univ. of Minas Gerais, Belo Horizonte, Brazil ; Gee, J.C. ; Campos, M.F.M.

Presents an exploratory and confirmatory factor analytic approach to morphometry in which a high-dimensional set of shape-related variables is examined with the purpose of finding clusters with strong correlation. This clustering can potentially identify regions that have anatomic significance and thus lend insight to morphometric investigations. In the present work, shape is characterized in a new basis, in which the variables account for the correlation among structural regions of interest. The analysis is based on information about size differences between the differential volume about points in a template image and their corresponding volumes in a subject image, where the correspondence is established by non-rigid registration. The method is demonstrated in a study of sex differences in the human corpus callosum. The authors show that the regions where those differences occur can be determined by unsupervised analysis. The most significant factors are used to represent the sample in a lower-dimensional basis, with which a prior model is constructed and used for classification

Published in:

Mathematical Methods in Biomedical Image Analysis, 2000. Proceedings. IEEE Workshop on

Date of Conference:

2000

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