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Related Experiment Videos

Quantification of cervical cord pathology in primary progressive MS using diffusion tensor MRI.

F Agosta1, B Benedetti, M A Rocca

  • 1Neuroimaging Research Unit, Scientific Institute and University Ospedale San Raffaele, Milan, Italy.

Neurology
|February 25, 2005
PubMed
Summary

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Diffusion tensor MRI (DT-MRI) reveals significant cervical cord damage in primary progressive multiple sclerosis (PPMS) patients, indicating irreversible axonal injury independent of brain damage.

Area of Science:

  • Neuroimaging
  • Neurology
  • Radiology

Background:

  • Primary progressive multiple sclerosis (PPMS) is a debilitating neurological disease characterized by gradual neurological decline.
  • Cervical cord damage is a key contributor to disability in MS, but its extent and severity are not fully understood.
  • Diffusion tensor MRI (DT-MRI) offers advanced techniques to visualize and quantify tissue microstructural changes.

Purpose of the Study:

  • To assess cervical cord damage in PPMS using diffusion tensor MRI (DT-MRI) and histogram analysis.
  • To quantify the extent and severity of cervical cord pathology in PPMS patients.
  • To investigate the relationship between cervical cord damage and brain pathology in PPMS.

Main Methods:

  • Acquisition of diffusion-weighted sensitivity-encoded (SENSE) echoplanar images of the cervical cord and brain in 24 PPMS patients and 13 healthy controls.

Related Experiment Videos

  • Generation of mean diffusivity and fractional anisotropy histograms for both cord and brain tissues.
  • Statistical comparison of DT-MRI parameters between patient and control groups using an analysis of variance model, adjusted for cord volume.

    • Main Results:

    • PPMS patients exhibited reduced cervical cord cross-sectional area and fractional anisotropy (FA) compared to controls (p = 0.007).
    • Increased mean diffusivity (MD) was observed in the cervical cords of PPMS patients (p = 0.024).
    • No significant correlations were found between DT-MRI metrics of the cervical cord and those of the brain.

    Conclusions:

    • DT-MRI of the cervical cord effectively quantifies diffuse pathology in PPMS.
    • Observed diffusivity changes in the PPMS cervical cord suggest irreversible axonal injury and reactive gliosis.
    • Cervical cord damage in PPMS appears to be an independent pathological process, distinct from brain damage.