Age-related brain atrophy and mental deterioration--a study with computed tomography

Area of Science:

• Neuroimaging
• Gerontology
• Neurology

Background:

• Age-related changes in brain structure are a significant concern in gerontology.
• Previous methods for quantifying brain atrophy have limitations.

Purpose of the Study:

• To develop and validate a new quantitative technique for measuring brain atrophy using computed tomography (CT).
• To investigate the relationship between brain atrophy and mental deterioration in living individuals.

Main Methods:

• A novel CT-based method was developed to segment brain, cerebrospinal fluid (CSF), and cranial cavity volumes.
• Brain volume index (BVI) was calculated for standardized comparisons.
• Hasegawa's dementia rating scale was used to assess mental function.

Main Results:

• Cerebrospinal fluid (CSF) volume remained stable until age 40, then increased significantly with age.
• Brain volume index (BVI) showed a statistically significant decrease after age 40.
• Increased brain atrophy was strongly correlated with decreased mental activity (p < 0.01).

Conclusions:

• The developed CT quantitative technique effectively measures age-related brain atrophy.
• Brain atrophy progresses with age, particularly after 40, and is linked to cognitive decline.
• Findings highlight the importance of monitoring brain volume changes for assessing cognitive health in aging populations.