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Multi-slice echo-planar spectroscopic MR imaging provides both global and local metabolite measures in multiple sclerosis

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Henrik Kahr Mathiesen
  • Thomas Tscherning
  • Per Soelberg Sorensen
  • Henrik B W Larsson
  • Egill Rostrup
  • Paulson, Olaf B.
  • Lars G Hanson
MR spectroscopy (MRS) provides information about neuronal loss or dysfunction by measuring decreases in N-acetyl aspartate (NAA), a metabolite widely believed to be a marker of neuronal viability. In multiple sclerosis (MS), whole-brain NAA (WBNAA) has been suggested as a marker of disease progression and treatment efficacy in treatment trials, and the ability to measure NAA loss in specific brain regions early in the evolution of this disease may have prognostic value. Most spectroscopic studies to date have been limited to single voxels or nonlocalized measurements of WBNAA only, and longitudinal studies have often been hampered by standardization and reproducibility problems. Multi-slice echo-planar spectroscopic imaging (EPSI) is presented as a promising alternative to single-voxel or nonlocalized spectroscopy for obtaining global metabolite estimates in MS. In the same session, measurements of metabolites in specific brain areas chosen after image acquisition (e.g., normal-appearing white matter (NAWM), gray matter (GM), and lesions) can be obtained. The identification and exclusion of regions that are inadequate for spectroscopic evaluation in global assessments can significantly improve quality and reproducibility, as demonstrated by a low within-subject variance in healthy controls. The reproducibility of the technique makes it a promising tool for future longitudinal spectroscopic studies of MS
OriginalsprogEngelsk
TidsskriftMagnetic Resonance in Medicine
Vol/bind53
Udgave nummer4
Sider (fra-til)750-759
Antal sider9
ISSN0740-3194
DOI
StatusUdgivet - 2005

Bibliografisk note

Copyright 2005 Wiley-Liss, Inc.

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