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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
09:33

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Published on: July 28, 2013

Quantitative diffusion tensor imaging for evaluation of motor function in patients with brain infarcts.

Xiang Liu1, L Li, W Tian

  • 1Department of Imaging Sciences, University of Rochester School of Medicine & Dentistry, Rochester, NY 14642-8638, USA. xiang_liu@urmc.rochester.edu

Acta Neurologica Scandinavica
|January 6, 2010
PubMed
Summary

Fractional anisotropy (FA) in the cerebral peduncle effectively differentiates stroke patients with varying motor function. Higher FA values indicate better motor abilities, aiding in assessing post-stroke recovery.

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Area of Science:

  • Neuroimaging
  • Neurology
  • Radiology

Background:

  • Stroke significantly impacts motor function, necessitating reliable methods for assessment.
  • Diffusion tensor imaging (DTI) offers quantitative insights into white matter integrity.

Purpose of the Study:

  • To assess quantitative diffusion values in the ipsilateral cerebral peduncle.
  • To identify thresholds for discriminating poor motor function post-stroke.

Main Methods:

  • Diffusion tensor imaging (DTI) was performed on 29 stroke patients.
  • Motor function was evaluated 8 months post-stroke.
  • Apparent diffusion coefficient (ADC) and fractional anisotropy (FA) values, along with their ratios, were analyzed.

Main Results:

  • Ipsilateral FA and FA ratio significantly correlated with motor function scales.
  • No significant differences or correlations were found for ipsilateral ADC or ADC ratio.
  • Cutoff values for FA (0.453) and FA ratio (0.623) discriminated poor motor function with high sensitivity and specificity.

Conclusions:

  • Ipsilateral FA value and FA ratio are effective imaging biomarkers.
  • These DTI metrics aid in discriminating motor function deficits after stroke.