Ultra-high field (10.5T) diffusion-weighted MRI of the macaque brain

Research output: Contribution to journalArticlepeer-review

Abstract

Diffu0sion-weighted magnetic resonance imaging (dMRI) is a non-invasive imaging technique that provides information about the barriers to the diffusion of water molecules in tissue. In the brain, this information can be used in several important ways, including to examine tissue abnormalities associated with brain disorders and to infer anatomical connectivity and the organization of white matter bundles through the use of tractography algorithms. However, dMRI also presents certain challenges. For example, historically, the biological validation of tractography models has shown only moderate correlations with anatomical connectivity as determined through invasive tract-tracing studies. Some of the factors contributing to such issues are low spatial resolution, low signal-to-noise ratios, and long scan times required for high-quality data, along with modeling challenges like complex fiber crossing patterns. Leveraging the capabilities provided by an ultra-high field scanner combined with denoising, we have acquired whole-brain, 0.58 mm isotropic resolution dMRI with a 2D-single shot echo planar imaging sequence on a 10.5 Tesla scanner in anesthetized macaques. These data produced high-quality tractograms and maps of scalar diffusion metrics in white matter. This work demonstrates the feasibility and motivation for in-vivo dMRI studies seeking to benefit from ultra-high fields.

Original languageEnglish (US)
Article number119200
JournalNeuroImage
Volume255
DOIs
StatePublished - Jul 15 2022

Bibliographical note

Funding Information:
This work was supported by NIH grants R01MH118257 (SRH) , P50MH119569 (SRH), P41EB027061 (CL, KU), U01EB025144 (KU), T32DA007234 to P. Mermelstein (MDG) , P30DA048742 (JZ, SRH), R56EB031765 (JZ), P50NS098753 (NH) , a UMN AIRP award (JZ, SRH), MnDrive Brain Conditions (SRH).

Publisher Copyright:
© 2022 The Author(s)

Keywords

  • Diffusion MRI
  • Nonhuman primate
  • Structural connectivity
  • Tractography

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

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