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Abstract #2167

Visualization of fine white matter bundles in the living human brain with diffusion MRI using 500 mT/m gradient strength

Chiara Maffei1, Yixin Ma1, Gabriel Ramos-Llordén1, Mirsad Mahmutovic2, Boris Keil2, Anastasia Yendiki1, Hong-Hsi Lee1, and Susie Y. Huang1
1Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital & Harvard Medical School, Charlestown, MA, United States, 2Institute of Medical Physics and Radiation Protection, Mittelhessen University of Applied Sciences, Giessen, Germany., Giessen, Germany

Synopsis

Keywords: Tractography, Gradients, Structural Connectivity

Motivation: There is a pressing need to move beyond the brain major white matter fasciculi in our understanding and characterization of human connectional neuroanatomy.

Goal(s): To perform initial in vivo high-resolution diffusion MRI on the next-generation Connectome 2.0 scanner equipped with 500 mT/m gradient strength.

Approach: We acquired 1-mm isotropic dMRI in one healthy subject on Connectome 2.0 and evaluated its capabilities in characterizing fine fiber bundles in comparison to Connectome 1.0.

Results: The SNR boost enabled by the Connectome 2.0 stronger gradient system allows resolution of fine white matter structures in deep brain regions and near the gray-white interface.

Impact: The ability to characterize fine white matter circuitry in the living human brain within reasonable scan times opens new possibilities for investigating their role in psychiatric and neurological disorders and enables the application of clinical interventions that target these pathways.

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