Periventricular venous density in multiple sclerosis is inversely associated with T2 lesion count: a 7 Tesla MRI

Tim Sinnecker1, Ivan Bozin, Jan Dörr

  • 1NeuroCure Clinical Research Center, Charité - University Medicine Berlin, Germany.

Multiple Sclerosis (Houndmills, Basingstoke, England)
|June 28, 2012
PubMed
Abstract

Insights

Decreased small blood vessel density in the brain is evident in early multiple sclerosis (MS) and clinically isolated syndrome. This finding, observed with 7 Tesla MRI, correlates with lesion load but not venous congestion.

Area of Science:

  • Neuroimaging
  • Vascular Biology
  • Neurology

Background:

  • Venular damage in multiple sclerosis (MS) has been recognized for decades.
  • Ultrahigh magnetic field strength T2*-weighted magnetic resonance imaging (MRI) now allows detailed visualization of small cerebral veins in vivo.

Purpose of the Study:

  • To investigate alterations in periventricular small blood vessel appearance in MS and clinically isolated syndrome (CIS) using 7 Tesla MRI.
  • To compare these alterations with T2 lesion count and distribution in patients and healthy controls.

Main Methods:

  • 38 patients (16 early MS, 7 CIS) and 22 healthy controls underwent 7 Tesla MRI.
  • T2*-weighted Fast Low Angle Shot and T2-weighted Turbo Inversion Recovery Magnitude sequences were utilized.
  • A novel region-of-interest-based algorithm quantified periventricular venous density and vascular area.

Main Results:

  • Significantly decreased venous density was observed in MS patients compared to controls.
  • Venous alterations were detectable, albeit to a lesser extent, in CIS and early MS.
  • Venous density showed an inverse correlation with periventricular and whole-brain T2 lesion count.
  • No evidence of cerebral venous congestion was found in MS patients.

Conclusions:

  • High-resolution T2*-weighted MRI reveals vascular changes in early MS stages.
  • These vascular alterations are likely part of broader hemodynamic and metabolic changes in MS.

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