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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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Published on: July 28, 2013

Diffusion tensor imaging of forearm nerves in humans.

Yuxiang Zhou1, Manickam Kumaravel, Vipulkumar S Patel

  • 1Diagnostic & Interventional Imaging, University of Texas Health Science Center at Houston, Houston, Texas, USA. Yuxiang.Zhou@uth.tmc.edu

Journal of Magnetic Resonance Imaging : JMRI
|June 13, 2012
PubMed
Summary

Diffusion Tensor Imaging (DTI) offers superior visualization of forearm nerves, specifically the median and ulnar nerves. This technique provides normative data that may aid in differentiating healthy nerves from diseased ones.

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Area of Science:

  • Medical Imaging
  • Neuroimaging
  • Biophysics

Background:

  • Peripheral nerve visualization is crucial for diagnosing neurological conditions.
  • Traditional MRI sequences have limitations in clearly delineating small nerve structures.
  • Diffusion Tensor Imaging (DTI) offers advanced tissue microstructural information.

Purpose of the Study:

  • To establish a Diffusion Tensor Imaging (DTI) protocol for enhanced visualization of peripheral nerves in the human forearm.
  • To assess the efficacy of DTI in delineating specific forearm nerves compared to conventional MRI sequences.

Main Methods:

  • A HIPAA-compliant study involving 10 healthy participants was conducted.
  • T(1)- and T(2)-weighted, STIR, and DTI sequences were utilized on a 3T MRI scanner with an 8-channel knee coil.
  • DTI-derived indices including fractional anisotropy (FA), mean diffusivity (MD), and radial/longitudinal diffusivity (λ(⟂), λ(//)) were calculated and mapped.

Main Results:

  • DTI-derived maps provided clearer delineation of forearm nerves compared to other sequences.
  • The ulnar and median nerves were distinctly visualized on DTI-derived fractional anisotropy (FA) maps.
  • Significant variations in DTI measures were observed along the nerve length and between the median and ulnar nerves.

Conclusions:

  • Diffusion Tensor Imaging (DTI) demonstrates superior performance in visualizing the median and ulnar nerves within the human forearm.
  • The generated normative DTI data holds potential for distinguishing between normal and pathological nerve conditions.