Fig. 2.

Exemplary slices of the annotated CT cases. On the left side, the sparse annotation scheme is visible in the coronal and sagittal slices, since only every fifth axial slice was annotated. On the top, the body regions label set is shown (e.g. red = subcutaneous tissue; green = muscles; blue = thoracic cavity; yellow = abdominal cavity), on the bottom, the corresponding body parts label set is shown (red = torso; yellow = right leg; blue = left leg; green = head; pink = right arm; cyan = left arm).