We followed 45 varsity hockey players during one season of play, and scanned all players at the beginning of the season. 11 players received a concussion, and were scanned within 72hrs post-concussion, and then again after 2 weeks and 2 months. Quantitative Susceptibility Maps were created from the multi-echo 3D gradient-echo data, and susceptibility values were measured in deep grey matter (caudate, pallidum, putamen, and thalamus) and frontal and posterior WM in the corpus callosum (genu and splenium). A linear mixed-effect model analysis of the regions of interest revealed no significant changes over time compared to baseline.
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