Figure 6.

SMA (red) used to calculate SMI, VAT (yellow) and SAT (light blue) on the same CT image. (A) Segmentation performed by semi-automatic tool. (B) segmentation performed by automatic tool. In this example, the automatic segmentation failed to include some small muscle areas (as the lateral part of the psoas muscles and some small dots within the anterior abdominal wall), likely due to low densities related to fat infiltration. SMA, skeletal muscle area; SMI, skeletal muscle index; VAT, visceral adipose tissue; SAT, subcutaneous adipose tissue; CT, computed tomography.