Normal-appearing white and grey matter damage in MS: A volumetric and diffusion tensor MRI study at 3.0 Tesla

Antonia Ceccarelli, Maria A. Rocca, Andrea Falini, Paola Tortorella, Elisabetta Pagani, Mariemma Rodegher, Giancarlo Comi, Giuseppe Scotti, Massimo Filippi

Research output: Contribution to journalArticle

Abstract

The aims of this study were to improve, using a 3.0 Tesla (T) scanner and diffusion tensor (DT) magnetic resonance imaging (MRI) with sensitivity encoding, our understanding of: 1) the possible pathological substrates of normal-appearing white matter (NAWM) and grey matter (GM) damage in multiple sclerosis (MS) and 2) the factors associated to WM and GM atrophy in this condition. Conventional and DT MRI of the brain were acquired from 32 relapsing-remitting (RR) MS patients and 16 controls. Lesion load, WM (WMV), overall GM (GMV), and neocortical GM (NCV) volumes were measured. NAWM mean diffusivity (MD) and fractional anisotropy (FA), and GM MD were calculated. GMV and NCV were lower (p ≤ 0.001) in MS patients than controls, whereas WMV did not differ significantly. MS patients had higher NAWM and GM average MD and lower NAWM average FA (p ≤ 0.001) than controls. Moderate correlations were found between intrinsic lesion and tissue damage with both GM volumetric and diffusivity changes (-0.41 ≤ r ≤ 0.42, p ≤ 0.04). DT MRI and volumetry measurements at 3.0 T confirm the presence of NAWM and GM abnormalities in RRMS patients. Although histopathology was not available, axonal and neuronal damage and consequent reactive glial proliferation are the most likely substrates of the changes observed.

Original languageEnglish
Pages (from-to)513-518
Number of pages6
JournalJournal of Neurology
Volume254
Issue number4
DOIs
Publication statusPublished - Apr 2007

Keywords

  • Grey matter
  • High-field MRI
  • Multiple sclerosis
  • White matter

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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