Volumetric CT body composition from L2-L4 improves reliability and validity over single-slice L3

Volumetric L2-L4 body composition on CT showed better reliability (higher ICCs) and stronger correlation with age than single-slice L3 analysis, in a retrospective study of 3,376 noncontrast and 9,103 contrast-enhanced paired exams.

• Deep learning models were applied to assess skeletal muscle, adipose tissue, and bone.
• Improvement was seen in both noncontrast and contrast-enhanced CT exams.

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