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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

Age-related apparent diffusion coefficient changes in the normal brain.

Memi Watanabe¹, Osamu Sakai, Al Ozonoff

¹Department of Radiology, Boston Medical Center, Boston University School of Medicine, 820 Harrison Ave, FGH Bldg, 3rd Floor, Boston, MA 02118, USA. memi.watanabe@bmc.org

|November 13, 2012

Summary

This summary is machine-generated.

Brain diffusivity changes across the human lifespan, identified in four distinct life stages. This study establishes a baseline for normal brain apparent diffusion coefficient (ADC) values throughout life.

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Area of Science:

Neuroimaging
Biophysics
Gerontology

Background:

Brain aging involves complex physiological changes.
Understanding normal brain development and aging is crucial for diagnosing neurological disorders.
Diffusion-weighted magnetic resonance imaging (MR) provides insights into tissue microstructure.

Purpose of the Study:

To quantify age-related brain diffusivity changes across the entire human lifespan.
To develop mathematical models of normal brain aging using apparent diffusion coefficient (ADC) histogram analysis.
To establish a normative baseline for brain ADC values.

Main Methods:

Retrospective analysis of brain MR imaging data from 414 healthy individuals (2 days to 89.3 years).
Utilized diffusion-weighted spin-echo single-shot echo-planar MR imaging.
Generated whole-brain ADC histograms and performed nonlinear regression to model age-related changes.

Main Results:

Identified four distinct stages of age-related changes in ADC peak values.
Observed exponential decay during maturation and development, a plateau in adulthood, and linear increase during senescence.
Developed a six-coefficient function accurately modeling age dependency (R² = 0.91).

Conclusions:

Brain diffusivity exhibits significant age-related alterations across four life periods.
The findings provide a comprehensive baseline for normal brain ADC values throughout life.
This research aids in differentiating normal aging from pathological changes in the brain.