UltraCortex: Submillimeter Ultra-High Field 9.4 T Brain MR Image Collection and Manual Cortical Segmentations

Lucas Mahler; Julius Steiglechner; Benjamin Bender; Tobias M. Lindig; Dana Ramadan; J Bause; Florian Birk; Rahel Heule; Edyta Charyasz; Michael Erb; Vinod Kumar; Gisela Elisabeth Hagberg; Pascal Martin; Gabriele Lohmann; Klaus Scheffler

doi:10.1038/s41597-025-04779-2

NeuroscienceScientific DataApr 15, 2025

Peer-reviewed journal article

UltraCortex: Submillimeter Ultra-High Field 9.4 T Brain MR Image Collection and Manual Cortical Segmentations

Lucas Mahler, Julius Steiglechner, Benjamin Bender iD, Tobias M. Lindig iD, Dana Ramadan, J Bause iD, Florian Birk iD, Rahel Heule iD, Edyta Charyasz, Michael Erb iD, Vinod Kumar iD, Gisela Elisabeth Hagberg iD, Pascal Martin iD, Gabriele Lohmann iD, Klaus Scheffler iD

Abstract

The UltraCortex repository (https://www.ultracortex.org) houses magnetic resonance imaging data of the human brain obtained at an ultra-high field strength of 9.4 T. It contains 86 structural MR images with spatial resolutions ranging from 0.6 to 0.8 mm. Additionally, the repository includes segmentations of 12 brains into gray and white matter compartments. These segmentations have been independently validated by two expert neuroradiologists, thus establishing them as a reliable gold standard. This resource provides researchers with access to high-quality brain imaging data and validated segmentations, facilitating neuroimaging studies and advancing our understanding of brain structure and function. Existing repositories do not accommodate field strengths beyond 7 T, nor do they offer validated segmentations, underscoring the significance of this new resource.

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