Reproducibility and Reliability of Quantitative and Weighted T1 and T2 * Mapping for Myelin-Based Cortical Parcellation at 7 Tesla

Roy A. M. Haast, Dimo Ivanov, Elia Formisano, Kamil Uludag*

*Corresponding author for this work

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Abstract

Different magnetic resonance (MR) parameters, such as R1 (=1/T1) or T2(∗), have been used to visualize non-invasively the myelin distribution across the cortical sheet. Myelin contrast is consistently enhanced in the primary sensory and some higher order cortical areas (such as MT or the cingulate cortex), which renders it suitable for subject-specific anatomical cortical parcellation. However, no systematic comparison has been performed between the previously proposed MR parameters, i.e., the longitudinal and transversal relaxation values (or their ratios), for myelin mapping at 7 Tesla. In addition, usually these MR parameters are acquired in a non-quantitative manner ("weighted" parameters). Here, we evaluated the differences in 'parcellability,' contrast-to-noise ratio (CNR) and inter- and intra-subject variability and reproducibility, respectively, between high-resolution cortical surface maps based on these weighted MR parameters
Original languageEnglish
Article number112
Pages (from-to)1-17
Number of pages17
JournalFrontiers in Neuroanatomy
Volume10
DOIs
Publication statusPublished - 18 Nov 2016

Keywords

  • myelin-related cortical mapping
  • ultra-high-field MRI
  • quantitative MRI
  • MR parameters
  • anatomy

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