Figure 13: Right tracheobronchial region with azygos vein (1), right pulmonary artery (2) and right main bronchus (3) (4: node and lymphatic tissue in front of first segmental branch (A1/3) of the right pulmonary artery, 5: first segmental branch (A1/3) of the right pulmonary artery, 6: subcarinal region, 7: confluens of V. cava and V. azygos)