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143 Diffusion Tensor and Susceptibility-weighted Imaging in Concussion Assessment of National Football League Players.

Posted on: 08.07.12 | by neurostudies

Neurosurgery. 2012 Aug;71(2):E558.

 

143 Diffusion Tensor and Susceptibility-weighted Imaging in Concussion Assessment of National Football League Players.

 

Luther N, Niogi S, Kutner K, Rodeo S, Shetty T, Warren R, Weiss L, Barnes R, Zimmerman R, Tsiouris A, Hartl R.

 

 

INTRODUCTION: Standard magnetic resonance imaging (MRI) is normal following the vast majority of concussions. Diffusion tensor imaging (DTI) and susceptibility-weighted imaging (SWI) are advanced MRI techniques hypothesized to be more sensitive in detecting subtle evidence of structural brain injury. Using DTI and SWI in National Football League (NFL) players, we aim to elucidate and localize the presence of such injury following concussions.

 

METHODS: This ongoing prospective study has recruited active NFL players with and without history of concussion within six months prior to entry. Neurological and neurocognitive examination, DTI, and SWI were performed on each subject. Blinded neuroradiologists performed radiographic analysis. Fractional anisotropy (FA) values were measured for eleven distinct white matter tracts on DTI. A global FA value was calculated. SWI was utilized to assess for microhemorrhage. Statistical comparisons between players with and without recent concussion, and to civilian controls, were made.

 

RESULTS: Seven of eighteen evaluated players to date had a concussion within six months of entry. On DTI, of the eleven tracts evaluated, a significant decrease in FA for concussed players was seen in one tract. There was no significant difference in global FA assessment between players with and without recent concussions. Civilian control comparisons are ongoing. SWI was negative in all players.

 

CONCLUSION: To our knowledge this is the largest prospective brain imaging study, and the first utilizing DTI and SWI to assess anatomical injury secondary to concussion, in NFL players. Minimal changes have been observed in players with recent concussion. The clinical significance of these findings remains under investigation.

 

PMID: 22811132  [PubMed – in process]

Categories: Support for DTI to Diagnose mTBI Tags: anisotropy, brain injury, concussion, diffusion tensor imaging, hartl, kutner, magnetic resonance imaging, mri techniques, national football league, nfl players, prospective study, rodeo, statistical comparisons, susceptibility, tracts, white matter, zimmerman

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