Quantification of body fat distribution in the abdomen using computed tomography

Area of Science:

• Radiology
• Anatomy
• Metabolic Health

Background:

• Abdominal fat distribution is a key indicator of metabolic health.
• Previous methods for assessing fat distribution were less precise.
• Understanding sex-based differences in fat distribution is crucial for health assessments.

Purpose of the Study:

• To quantify abdominal fat distribution using computed tomography (CT).
• To compare fat distribution patterns between males and females at different abdominal levels.
• To investigate correlations between fat volumes, body mass index, and age.

Main Methods:

• Utilized computed tomography (CT) to measure total abdominal volume (TA), total fat volume (TF), subcutaneous fat volume (SF), and intra-abdominal fat volume (IF).
• Calculated ratios of TF/TA, SF/TF, and IF/TF at L1, L3, and L5 vertebral levels.
• Performed regression analyses to correlate fat volumes with BMI and age.

Main Results:

• CT accurately quantified abdominal fat volumes and their distribution.
• Significant linear correlations were found between measured fat volumes (TA, SF, IF, TF) and body mass index.
• Females exhibited higher total fat volume and a greater proportion of subcutaneous fat.
• Males showed more intra-abdominal fat than subcutaneous fat at L1 and L3 levels.
• Sex-based differences in fat distribution were most pronounced at the L1 level.

Conclusions:

• Computed tomography offers a noninvasive method for precise abdominal fat quantification.
• Inherent sex-based differences in abdominal fat distribution exist, independent of body weight.
• Body fat distribution varies significantly between males and females and across different abdominal levels.