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Summary
This summary is machine-generated.

White matter hyperintensities (WMH) are linked to brain atrophy and accelerated brain aging. Increased WMH correlate with lower brain volumes and larger ventricles, indicating faster brain aging.

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Area of Science:

  • Neuroimaging
  • Radiology
  • Gerontology

Background:

  • Brain age estimation from MRI reveals aging factors.
  • White matter hyperintensities (WMH) may indicate increased brain aging.

Purpose of the Study:

  • Investigate the relationship between WMH and brain age.
  • Determine if WMH are associated with brain atrophy and accelerated brain aging.

Main Methods:

  • Utilized MRI scans from 1,164 healthy participants.
  • Employed deep learning for automated WMH segmentation and brain age calculation.
  • Analyzed correlations between WMH volume, brain age gap, and regional brain volumes.

Main Results:

  • Increased WMH correlated with lower brain volumes (hippocampus, cerebral white matter, thalamus) and larger ventricles.
  • Higher WMH burden was significantly associated with increased brain age and brain age gap.
  • Mean brain age closely matched chronological age in the study cohort.

Conclusions:

  • Elevated WMH are associated with brain atrophy in both Alzheimer's and non-Alzheimer's related regions.
  • WMH are a significant imaging biomarker for accelerated brain aging.
  • Findings highlight the role of small vessel disease in brain aging processes.