Figure 6 Result of the body composition assessment - skeletal system. ROIs are defined by lines 1–7. The line number 1 separating the head should pass directly below the chin. The line number 2 separating the spine from the chest should pass as close to the spine as possible. The line number 3 separating the upper limbs from the body should pass through the shoulder joints as close to the body as possible. A perpendicular line inside the area defined by line number 2 should separate the thoracic spine from the lumbar spine. The line number 4 separating the pelvis from the trunk should pass over the upper edge of the iliac crests. The line number 5 separating the pelvis from the lower limbs should cross the femoral necks. Line number 6 should cut the airspace between the upper and lower limbs and line number 7 the airspace between the lower limbs.