[Assessment of brain neural pathways in diffuse axonal injuries using diffusion-tensor magnetic resonance tomography]

Area of Science:

• Neuroimaging
• Neurology
• Radiology

Background:

• Severe diffuse axonal injury (DAI) poses diagnostic and prognostic challenges.
• Diffusion-tensor magnetic resonance imaging (DT-MRI) is a promising tool for assessing white matter integrity.

Purpose of the Study:

• To evaluate the diagnostic and prognostic utility of DT-MRI in patients with severe DAI.
• To correlate DT-MRI findings with clinical outcomes.

Main Methods:

• DT-MRI was performed on 22 DAI patients and 8 healthy volunteers between days 2-17 post-injury.
• Fractional anisotropy (FA) and diffusion coefficient (DCI) indices were measured in specific white matter tracts.
• Clinical outcomes were assessed at 6 months using the Glasgow Outcome Scale (GOS).

Main Results:

• Patients with DAI showed significantly decreased FA values along corticospinal tracts (CST) and in the corpus callosum compared to controls.
• Reduced FA correlated with motor deficits (hemiparesis, tetraparesis) and predicted patient outcomes.
• 3D CST reconstruction revealed tract asymmetry in DAI patients.

Conclusions:

• FA indices derived from DT-MRI accurately reflect white matter pathway integrity in DAI.
• DT-MRI is valuable for detecting quantitative and qualitative white matter alterations.
• DT-MRI findings have significant clinical and prognostic implications for DAI patients.