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Big Data"],"abstract":"<jats:sec><jats:title>Introduction<\/jats:title><jats:p>Quantitative global or regional brain imaging measurements, known as imaging-specific or -derived phenotypes (IDPs), are commonly used in genotype-phenotype association studies to explore the genomic architecture of the brain and how it may be affected by neurological diseases (e.g., Alzheimer's disease), mental health (e.g., depression), and neurodevelopmental disorders (e.g., attention-deficit hyperactivity disorder [ADHD]). For this purpose, medical images have been used as IDPs using a voxel-wise or global approach via principal component analysis. However, these methods have limitations related to multiple testing or the inability to isolate high variation regions, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>To address these limitations, this study investigates a localized, principal component analysis-like approach for dimensionality reduction of cross-sectional T1-weighted MRI datasets utilizing diffeomorphic morphometry. This approach can reduce the dimensionality of images while preserving spatial information and enables the inclusion of spatial locality in the analysis. In doing so, this method can be used to explore morphometric brain changes across specific components and spatial scales of interest and to identify associations with genome regions in a multivariate genome-wide association study. For a first clinical feasibility study, this method was applied to data from the Adolescent Brain Cognitive Development (ABCD) study, including adolescents with ADHD (n = 1,359), obsessive-compulsive disorder (n = 1,752), and depression (n = 1,766).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Meaningful associations of specific morphometric features with genome regions were identified with the data and corresponded to previous found brain regions in the respective mental health and neurodevelopmental disorder cohorts.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>In summary, the localized, principal component analysis-like approach can reduce the dimensionality of medical images while still being able to identify meaningful local brain region alterations that are associated with genomic markers across multiple scales. The proposed method can be applied to various image types and can be easily integrated in many genotype-phenotype association study setups.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fdata.2024.1429910","type":"journal-article","created":{"date-parts":[[2024,12,11]],"date-time":"2024-12-11T07:04:58Z","timestamp":1733900698000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Application of a localized morphometrics approach to imaging-derived brain phenotypes for genotype-phenotype associations in pediatric mental health and neurodevelopmental disorders"],"prefix":"10.3389","volume":"7","author":[{"given":"Gabrielle","family":"Dagasso","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthias","family":"Wilms","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sarah J.","family":"MacEachern","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nils D.","family":"Forkert","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2024,12,11]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"207","DOI":"10.1016\/j.neuroimage.2013.12.015","article-title":"Non-negative matrix factorization of multimodal MRI., fMRI and phenotypic data reveals differential changes in default mode subnetworks in ADHD","author":"Anderson","year":"2014","journal-title":"Neuroimage"},{"key":"B2","doi-asserted-by":"publisher","first-page":"43","DOI":"10.1016\/j.neuroimage.2015.06.083","article-title":"Decomposition of brain diffusion imaging data uncovers latent schizophrenias with distinct patterns of white matter anisotropy","volume":"120","author":"Arnedo","year":"2015","journal-title":"Neuroimage"},{"key":"B3","doi-asserted-by":"publisher","first-page":"348","DOI":"10.1002\/(SICI)1097-0193(1998)6:5\/6<348::AID-HBM4>3.0.CO;2-P","article-title":"Identifying global anatomical differences: deformation-based morphometry","volume":"6","author":"Ashburner","year":"1998","journal-title":"Human Brain Mapp"},{"key":"B4","doi-asserted-by":"publisher","first-page":"26","DOI":"10.1016\/j.media.2007.06.004","article-title":"Symmetric diffeomorphic image registration with cross-correlation: evaluating automated labeling of elderly and neurodegenerative brain","volume":"12","author":"Avants","year":"2008","journal-title":"Med. 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