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Related Experiment Video

Updated: Mar 10, 2026

Advanced Diffusion Imaging in The Hippocampus of Rats with Mild Traumatic Brain Injury
10:33

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High angular resolution diffusion-weighted imaging in mild traumatic brain injury.

Mehrbod Mohammadian1, Timo Roine2, Jussi Hirvonen3

  • 1Department of Neurology, University of Turku, Turku, Finland; Division of Clinical Neurosciences, Department of Rehabilitation and Brain Trauma, Turku University Hospital, Turku, Finland.

Neuroimage. Clinical
|December 17, 2016
PubMed
Summary
This summary is machine-generated.

Diffusion-weighted MRI reveals white matter abnormalities in mild traumatic brain injury (mTBI). A global analysis focusing on single-fiber voxels identified significant changes in microstructural parameters, suggesting a promising imaging biomarker for mTBI.

Keywords:
AD, axial diffusivityCSD, constrained-spherical deconvolutionDAI, diffuse axonal injuryDTI, diffusion tensor imagingDW-MRI, diffusion-weighted magnetic resonance imagingDiffusion-weighted magnetic resonance imagingFA, fractional anisotropyGCS, Glasgow Coma ScaleGOSe, Glasgow Outcome Scale extendedGlobal approachHARDI, high angular resolution diffusion imagingMD, mean diffusivityMagnetic resonance imagingPTA, post-traumatic amnesiaProbabilistic tractographyRD, radial diffusivityTBI, traumatic brain injuryTBSS, tract-based spatial statisticsTraumatic brain injurymTBI, mild traumatic brain injury

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Area of Science:

  • Neuroimaging
  • Neurology
  • Radiology

Background:

  • Mild traumatic brain injury (mTBI) can cause subtle white matter abnormalities.
  • Diffusion-weighted magnetic resonance imaging (DW-MRI) is sensitive to microstructural changes in the brain.

Purpose of the Study:

  • To investigate white matter abnormalities in mTBI patients using DW-MRI.
  • To evaluate a global analysis approach for detecting these abnormalities.

Main Methods:

  • DW-MRI was performed on 102 mTBI patients and 30 controls.
  • A global approach focusing on single-fiber voxels was applied, alongside tract skeleton analysis and tractography.
  • Microstructural parameters were correlated with age, time from injury, patient outcome, and white matter hyperintensities.

Main Results:

  • The global approach restricted to single-fiber voxels showed significantly decreased fractional anisotropy (FA) and increased radial diffusivity in mTBI patients compared to controls.
  • This single-fiber voxel approach yielded more significant and reproducible results than other methods.
  • FA correlated with patient outcomes, white matter hyperintensities, and age.

Conclusions:

  • A global DW-MRI approach focusing on single-fiber voxels is a promising method for detecting white matter abnormalities in mTBI.
  • This method offers a potentially valuable imaging biomarker for mTBI assessment.