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• W2133086277 abstract "<para xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> We present <emphasis emphasistype=bold>iCluster</emphasis>, a fast and efficient algorithm that clusters a set of images while co-registering them using a parameterized, nonlinear transformation model. The output of the algorithm is a small number of template images that represent different modes in a population. This is in contrast with traditional, hypothesis-driven computational anatomy approaches that assume a single template to construct an atlas. We derive the algorithm based on a generative model of an image population as a mixture of deformable template images. We validate and explore our method in four experiments. In the first experiment, we use synthetic data to explore the behavior of the algorithm and inform a design choice on parameter settings. In the second experiment, we demonstrate the utility of having multiple atlases for the application of localizing temporal lobe brain structures in a pool of subjects that contains healthy controls and schizophrenia patients. Next, we employ iCluster to partition a data set of 415 whole brain MR volumes of subjects aged 18 through 96 years into three anatomical subgroups. Our analysis suggests that these subgroups mainly correspond to age groups. The templates reveal significant structural differences across these age groups that confirm previous findings in aging research. In the final experiment, we run iCluster on a group of 15 patients with dementia and 15 age-matched healthy controls. The algorithm produces two modes, one of which contains dementia patients only. These results suggest that the algorithm can be used to discover subpopulations that correspond to interesting structural or functional “modes.” </para>" @default.
• W2133086277 created "2016-06-24" @default.
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• W2133086277 date "2009-09-01" @default.
• W2133086277 modified "2023-10-17" @default.
• W2133086277 title "Image-Driven Population Analysis Through Mixture Modeling" @default.
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• W2133086277 doi "https://doi.org/10.1109/tmi.2009.2017942" @default.
• W2133086277 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2832589" @default.
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