Anorexia Nervosa: Analysis of Trabecular Texture with CT

Area of Science:

• Radiology
• Bone Densitometry
• Medical Imaging

Background:

• Anorexia nervosa is associated with significant skeletal fragility.
• Assessing bone health in anorexia nervosa often relies on bone mineral density, which may not capture all aspects of skeletal integrity.

Purpose of the Study:

• To evaluate skeletal integrity using computed tomographic (CT) trabecular texture analysis in the lumbar spine of patients with anorexia nervosa.
• To identify body composition predictors of trabecular texture in this population.

Main Methods:

• Cross-sectional study involving 30 women with anorexia nervosa and 30 healthy controls.
• Quantitative CT of the L4 vertebral body to assess trabecular texture parameters (skewness, kurtosis, entropy, MPP) and bone mineral density.
• Linear regression to analyze associations between texture parameters and body composition.

Main Results:

• Women with anorexia nervosa exhibited higher skewness and kurtosis, and lower mean value of positive pixels (MPP) compared to controls.
• Bone mineral density, abdominal fat, and paraspinal muscle areas were inversely associated with skewness and kurtosis, and positively with MPP and entropy.
• Trabecular texture parameters, but not bone mineral density, correlated with lowest lifetime weight and duration of amenorrhea in anorexia nervosa.

Conclusions:

• Anorexia nervosa is characterized by altered trabecular texture, including increased skewness and kurtosis and decreased entropy and MPP.
• These texture alterations are linked to clinical factors like lowest weight and amenorrhea duration, offering insights beyond bone mineral density.
• Trabecular texture analysis may provide complementary information on bone health in anorexia nervosa, independent of bone mineral density measurements.