Normal aging in the basal ganglia evaluated by eigenvalues of diffusion tensor imaging

Area of Science:

• Neuroimaging
• Radiology
• Gerontology

Background:

• Human brain aging is associated with altered water diffusion patterns.
• Diffusion patterns in the basal ganglia differ from those in white matter.
• Diffusion Tensor Imaging (DTI) provides insights into tissue microstructure.

Purpose of the Study:

• To investigate age-related changes in water diffusion within the basal ganglia.
• To utilize DTI eigenvalues to understand brain aging in the basal ganglia.
• To compare diffusion patterns in the basal ganglia with aging.

Main Methods:

• Studied 71 healthy subjects aged 20-79 years.
• Analyzed mean diffusivity (MD), fractional anisotropy (FA), and DTI eigenvalues (lambda(1), lambda(23)).
• Performed statistical analysis using Pearson correlation to assess age-dependence.

Main Results:

• Reduced MD observed in the caudate nucleus and putamen with aging.
• Increased FA found in the putamen with aging.
• Eigenvalue lambda(23) decreased significantly in the putamen and caudate nucleus, indicating altered diffusion.

Conclusions:

• DTI eigenvalues offer deeper insights into age-related diffusion changes in the basal ganglia.
• Specific diffusion patterns vary across basal ganglia structures during aging.
• Eigenvalue analysis enhances understanding of basal ganglia aging.