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Abstract #0132

Do Non-Gaussian diffusion MRI methods improve the detection or specification of cellular alterations following traumatic brain injury?

Elizabeth B Hutchinson1,2, Sarah King1, Alexandru Avram3, M Okan Irfanoglu1, Michal Komlosh2,4, Susan Schwerin2,5, Eli Shindell5, Sharon Juliano5, and Carlo Pierpaoli1

1QMI/NIBIB, National Institutes of Health, Bethesda, MD, United States, 2Henry M. Jackson Foundation, Bethesda, MD, United States, 3NIBIB, National Institutes of Health, Bethesda, MD, United States, 4NICHD, National Institutes of Health, Bethesda, MD, United States, 5APG, Uniformed Services University, Bethesda, MD, United States

Following traumatic brain injury (TBI), numerous microscale cellular alterations appear and evolve with a range of consequences for adverse outcomes and recovery. Diffusion tensor MRI (DTI) has been identified as a potentially sensitive tool for characterizing these changes, but is notably limited in providing specific information about particular cellular alterations and more advanced non-Gaussian frameworks have been developed that may address these limitations. To assess the utility of non-Gaussian modeling for improved detection and specification of TBI-related cellular alterations, we compared DTI, DKI and MAP-MRI in mouse brains following mild TBI and their correspondence to histopathology in the same tissue.

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