Radiomic tractometry reveals tract-specific imaging biomarkers in white matter

Peter Neher (), Dusan Hirjak and Klaus Maier-Hein
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Peter Neher: Division of Medical Image Computing
Dusan Hirjak: Medical Faculty Mannheim, Heidelberg University, J5
Klaus Maier-Hein: Division of Medical Image Computing

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Tract-specific microstructural analysis of the brain’s white matter (WM) using diffusion MRI has been a driver for neuroscientific discovery with a wide range of applications. Tractometry enables localized tissue analysis along tracts but relies on bare summary statistics and reduces complex image information along a tract to few scalar values, and so may miss valuable information. This hampers the applicability of tractometry for predictive modelling. Radiomics is a promising method based on the analysis of numerous quantitative image features beyond what can be visually perceived, but has not yet been used for tract-specific analysis of white matter. Here we introduce radiomic tractometry (RadTract) and show that introducing rich radiomics-based feature sets into the world of tractometry enables improved predictive modelling while retaining the localization capability of tractometry. We demonstrate its value in a series of clinical populations, showcasing its performance in diagnosing disease subgroups in different datasets, as well as estimation of demographic and clinical parameters. We propose that RadTract could spark the establishment of a new generation of tract-specific imaging biomarkers with benefits for a range of applications from basic neuroscience to medical research.

Date: 2024
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DOI: 10.1038/s41467-023-44591-3

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