Regional Variations in Normal Brain Shown by Quantitative Magnetization Transfer Imaging

John G. Sled, I. Levesque, A. C. Santos, S. J. Francis, S. Narayanan, S. D. Brass, D. L. Arnold, G. B. Pike

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


A quantitative magnetization transfer imaging (qMTI) study, based on a two-pool model of magnetization transfer, was performed on seven normal subjects to determine, on a regional basis, normal values for the pool sizes, exchange, and relaxation parameters that characterize the MT phenomenon. Regions were identified on high-resolution anatomical scans using a combination of manual and automatic methods. Only voxels identified as pure tissue at the resolution of the quantitative scans were considered for analysis. While no left/right differences were observed, significant differences were found among white-matter regions and gray-matter regions. These regional differences were compared with existing cytoarchitectural data. In addition, the pattern and magnitude of the regional differences observed in white matter was found to be different from that reported previously for an alternative putative MRI measure of myelination, the 10-50-ms T2 component described as myelin water.

Original languageEnglish (US)
Pages (from-to)299-303
Number of pages5
JournalMagnetic Resonance in Medicine
Issue number2
StatePublished - Feb 2004
Externally publishedYes


  • Magnetization transfer
  • Myelin
  • Quantitative imaging
  • T relaxation
  • White matter

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology


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