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Whole mouse brain connectomics.

G Allan Johnson1,2, Nian Wang1, Robert J Anderson1

  • 1Department of Radiology, Duke Center for in vivo Microscopy, Duke Medical Center, Durham, North Carolina.

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|October 18, 2018
PubMed
Summary
This summary is machine-generated.

New magnetic resonance imaging (MRI) methods enable quantitative whole mouse brain connectivity mapping. This high-resolution diffusion tensor imaging (DTI) approach significantly reduces false positive tracts for routine studies.

Keywords:
ConnectomesMR histologyMRImouse brain

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Area of Science:

  • Neuroimaging
  • Connectomics
  • Mouse Brain Research

Background:

  • Quantitative connectivity mapping of the mouse brain is crucial for understanding neural circuits.
  • Existing methods face limitations in resolution and efficiency.

Purpose of the Study:

  • To develop and validate advanced magnetic resonance imaging (MRI) methods for high-fidelity whole mouse brain connectome reconstruction.
  • To translate clinical imaging expertise to the specialized domain of mouse brain research.

Main Methods:

  • Utilized diffusion tensor imaging (DTI) on perfusion-fixed mouse brains with optimized specimen preparation and active staining.
  • Integrated compressed sensing with high-performance reconstruction for rapid data acquisition (<12 hours).
  • Achieved a spatial resolution of 45 μm³.

Main Results:

  • Successfully generated whole mouse brain connectomes with meso-scale anatomical definition.
  • Demonstrated substantial reduction of false positive tracts to approximately 28%.
  • Validated the DTI-based methods against retroviral tracer studies.

Conclusions:

  • The developed MRI techniques provide a streamlined, high-fidelity approach for routine whole mouse brain connectome studies.
  • The method offers quantitative insights into brain structure, including subfield volumes, DTI metrics, and tractography.
  • This advancement facilitates holistic understanding of the mouse brain's neural architecture.