Unbiased diffeomorphic atlas construction for computational anatomy

S. Joshi, Brad Davis, Matthieu Jomier, Guido Gerig

    Research output: Contribution to journalArticle

    Abstract

    Construction of population atlases is a key issue in medical image analysis, and particularly in brain mapping. Large sets of images are mapped into a common coordinate system to study intra-population variability and inter-population differences, to provide voxel-wise mapping of functional sites, and help tissue and object segmentation via registration of anatomical labels. Common techniques often include the choice of a template image, which inherently introduces a bias. This paper describes a new method for unbiased construction of atlases in the large deformation diffeomorphic setting. A child neuroimaging autism study serves as a driving application. There is lack of normative data that explains average brain shape and variability at this early stage of development. We present work in progress toward constructing an unbiased MRI atlas of 2 years of children and the building of a probabilistic atlas of anatomical structures, here the caudate nucleus. Further, we demonstrate the segmentation of new subjects via atlas mapping. Validation of the methodology is performed by comparing the deformed probabilistic atlas with existing manual segmentations.

    Original languageEnglish (US)
    Pages (from-to)S151-S160
    JournalNeuroImage
    Volume23
    Issue numberSUPPL. 1
    DOIs
    StatePublished - 2004

    Keywords

    • Brain atlases
    • Computational anatomy
    • Image segmentation
    • Registration

    ASJC Scopus subject areas

    • Neurology
    • Cognitive Neuroscience

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