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Abstract #1233

Quantifying Muscle Inflammation with Diffusion Basis Spectrum Imaging

Carlos J Perez-Torres 1 , Neva B Watson 2 , Yong Wang 1,3 , Paul T Massa 2,4 , and Sheng-Kwei Song 1,3

1 Radiology, Washington University, St. Louis, MO, United States, 2 Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States, 3 Hope Center for Neurological Disorders, Washington University, St. Louis, MO, United States, 4 Neurology, SUNY Upstate Medical University, Syracuse, NY, United States

Once considered a tropical disease, infectious myositis is an underappreciated emerging global affliction. Diffusion basis spectrum imaging (DBSI) has been previously utilized to separately quantify inflammatory pathology and fiber pathology in white matter diseases such as multiple sclerosis. The present work is the first example of DBSI being applied to muscle pathology. DBSI-derived restricted isotropic diffusion is usually associated with increased immune cell infiltration. The restricted fraction increased in both lesion and normal-appearing muscle. At first glance, DBSI seems capable of detecting inflammation in the muscle that might be missed by just looking at ADC or FA.

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