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Abstract #3384

Fixel Based Analysis detection of peri-lesion and NAWM abnormalities in Relapsing Remitting Multiple Sclerosis

Nikolai I Lesack1, Sarah Levy2, James Sumowski2, Stephanie S. G. Brown3, Sam Horng2, and Rebecca Emily Feldman1
1Medical Physics, University of British Columbia, Kelowna, BC, Canada, 2Icahn School of Medicine at Mount Sinai, New York, NY, United States, 3University of Cambridge, Cambridge, United Kingdom

Synopsis

Keywords: Multiple Sclerosis, Diffusion/other diffusion imaging techniques, fixed based analysis, DTI, brain, lesions, peri-lesion, normal appearing white matterDiffusion Tensor Imaging and Fixel Based Analysis (FBA) techniques were used to analyze microstructural properties of multiple sclerosis (MS) lesions and normal appearing white matter (NAWM) in relapsing-remitting multiple sclerosis (RRMS) subjects. FBA metric values were similar in peri-lesion white matter and MS lesions compared with bulk NAWM which may indicate FBA metric sensitivity to the infiltration of RRMS lesion pathology into surrounding NAWM. FBA fibre density in bulk NAWM was significantly different between subjects treated with Copaxone vs. Tysabri, which may indicate FBA metric sensitivity to NAWM differences between disease modifying therapies.

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