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Related Experiment Videos

MR tractography with diffusion tensor imaging in clinical routine.

T H Nguyen1, M Yoshida, J L Stievenart

  • 1Department of Neuro-Imaging, Centre Hospitalier National d'Ophtalmologie des XV-XX, UPMC Paris 6, CNRS UMR 6569, UPR 2147, Paris, France. thnguyenfr@yahoo.fr

Neuroradiology
|April 20, 2005
PubMed
Summary
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Diffusion tensor imaging (DTI) tractography is now a routine MRI procedure for visualizing white matter pathways. This fast, reliable method accurately depicts normal and diseased brain connections, aiding in diagnosing white matter diseases.

Area of Science:

  • Neuroimaging
  • Radiology
  • Neurology

Background:

  • Cerebral white matter fiber tract depiction is a routine MRI procedure.
  • Diffusion tensor (DT) sequences enable indirect visualization of white matter connections via volume analysis and tractography extraction software.

Purpose of the Study:

  • To demonstrate the routine applicability of diffusion tensor imaging (DTI) tractography for visualizing cerebral white matter.
  • To assess the reliability and reproducibility of DTI tractography in both healthy subjects and patients with neurological diseases.

Main Methods:

  • Acquired DT data from 20 healthy subjects and 5 patients with cerebral diseases (brain tumors, multiple sclerosis, stroke).
  • Utilized dedicated workstations for anatomical realignment, voxel eigenvector determination, and fiber tract orientation calculation.

Related Experiment Videos

  • Compared data from diseased regions with contralateral areas to identify changes in voxel anisotropy.

    • Main Results:

    • Successfully delineated axonal directions of main neuronal pathways in all subjects.
    • Observed changes in voxel anisotropy in injured regions, indicating altered fiber orientations within T2 hyperintensities.
    • Demonstrated that rapid data processing allows for routine imaging of normal and diseased fiber pathways.

    Conclusions:

    • DTI tractography is a fast, simple, reliable, and reproducible method for routine MRI examinations.
    • This technique is valuable for imaging both normal and diseased white matter fiber pathways.
    • Tractography is recommended whenever white matter disease is suspected.