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Diffusion tensor imaging (DTI) and free water fraction (FWF) injury group means at C4 at 90 days. Axial diffusivity using the free water elimination (FWE) model (ADFWE) and mean diffusivity (MDFWE) appear to decrease with injury severity, while FWFFWE increases. DTI parameters do not show a strong relationship to injury severity. Color image is available online.
