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Related Experiment Video

Updated: Sep 11, 2025

Microdissection and Whole Mount Scanning Electron Microscopy Visualization of Mouse Choroid Plexus
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Microdissection and Whole Mount Scanning Electron Microscopy Visualization of Mouse Choroid Plexus

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The choroid plexus water density.

Abigail R Dubois1, Maeve Curtin1, Kilian Hett1

  • 1Department of Neurology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.

Magnetic Resonance in Medicine
|August 11, 2025
PubMed
Summary
This summary is machine-generated.

The choroid plexus (ChP) water density in healthy adults is approximately 0.895, showing no significant daily changes. This finding provides a crucial reference for neuroimaging protocols utilizing ChP MRI.

Keywords:
cerebrospinal fluidchoroid plexusproton densitywater density

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Area of Science:

  • Neuroimaging
  • Biophysics
  • Human Physiology

Background:

  • The choroid plexus (ChP) is a key structure within the brain ventricles responsible for cerebrospinal fluid production.
  • Understanding the quantitative properties of the ChP, such as water density, is essential for interpreting advanced neuroimaging data.
  • Previous studies have not comprehensively quantified the diurnal variation of ChP water density in healthy adults.

Purpose of the Study:

  • To establish normative ranges for choroid plexus (ChP) water density in healthy adults.
  • To investigate the circadian variability of ChP water density throughout the day.
  • To provide a quantitative reference for ChP MRI-based metrics.

Main Methods:

  • Fifteen healthy participants underwent 5-day actigraphy for circadian activity assessment.
  • High-resolution proton density-weighted MRI scans were acquired at four time points during wakefulness.
  • Choroid plexus (ChP) water density was calculated using a ratio method involving white matter and ChP signal intensities.

Main Results:

  • The overall mean ChP water density was 0.895 ± 0.047, with a range of 0.806-0.983.
  • Water density measurements across different time epochs (morning, midday, afternoon, evening) showed no statistically significant differences.
  • No correlation was found between ChP water density and time of day or circadian activity levels.

Conclusions:

  • The normative value for choroid plexus (ChP) water density in healthy adults is approximately 0.895.
  • ChP water density remains stable throughout the day and is not significantly influenced by circadian rhythms during wakefulness.
  • This established normative value serves as a vital reference for quantitative neuroimaging studies involving the ChP.