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Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
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Glymphatic imaging using MRI.

Toshiaki Taoka1, Shinji Naganawa1

  • 1Department of Radiology, Nagoya University, Nagoya, Japan.

Journal of Magnetic Resonance Imaging : JMRI
|August 20, 2019
PubMed
Summary
This summary is machine-generated.

The glymphatic system clears brain waste via cerebrospinal fluid (CSF) and interstitial fluid (ISF). Diffusion imaging MRI techniques are effective tools for evaluating this crucial brain clearance pathway.

Keywords:
cerebrospinal fluidcontrast mediadiffusion imagingglymphatic systeminterstitial fluidmagnetic resonance imaging

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Area of Science:

  • Neuroscience
  • Radiology
  • Biomedical Engineering

Background:

  • The brain possesses a mass transport system involving cerebrospinal fluid (CSF) and interstitial fluid (ISF).
  • The glymphatic system is a hypothesized brain waste clearance pathway utilizing CSF through perivascular and interstitial spaces.
  • Accumulating evidence supports the glymphatic system's existence, primarily from tracer studies.

Purpose of the Study:

  • To review and discuss findings from diffusion imaging studies evaluating glymphatic system function.
  • To highlight the utility of diffusion-weighted MRI in assessing interstitial fluid (ISF) dynamics.

Main Methods:

  • In vivo tracer studies using fluorescent tracers and two-photon microscopy.
  • Magnetic Resonance Imaging (MRI) with gadolinium-based contrast agents (GBCAs) via intrathecal or intravenous injections.
  • Diffusion imaging techniques, including diffusion-weighted MRI, to evaluate ISF dynamics and water movement within brain tissue.

Main Results:

  • Tracer studies have provided visualization and evidence for the glymphatic system.
  • MRI, particularly with GBCAs, is a valuable tool for assessing glymphatic function.
  • Diffusion-weighted MRI shows promise for evaluating water movement and ISF dynamics within the brain.

Conclusions:

  • The glymphatic system is a critical brain waste clearance mechanism.
  • Various imaging techniques, including MRI and diffusion imaging, are instrumental in studying glymphatic function.
  • Diffusion studies offer a promising avenue for further understanding ISF dynamics and glymphatic system evaluation.