| 1
.
| Serratus anterior muscle (upper portion) |
| 2
.
| Depression formed by vertebral border of scapula |
| 3
.
| Rib III (cut off) |
| 4
.
| Cupula pleurae |
| 5
.
| Azygos vein (covered by mediastinal pleura) |
| 6
.
| Upper pointer: Bronchus of upper right lobe Lower pointer: Right main bronchus (to middle and lower lobes) |
| 7
.
| Bronchopulmonary lymph node |
| 8
.
| Left atrium (right superior pulmonary vein cut off above pointer, right inferior pulmonary vein cut off below pointer) |
| 9
.
| Right vagus nerve |
| 10
.
| Esophagus |
| 11
.
| Pulmonary ligament |
| 12
.
| Diaphragm |
| 13
.
| Clavicle |
| 14
.
| Subclavius muscle |
| 15
.
| Subclavian artery and vein |
| 16
.
| Rib I |
| 17
.
| Pectoralis major muscle (cut off) |
| 18
.
| Right pulmonary artery |
| 19
.
| Internal thoracic artery |
| 20
.
| Costal cartilage III |
| 21
.
| Line of reflection of mediastinal pleura onto lung |
| 22
.
| Costomediastinal recess |
| 23
.
| Right atrium (covered by pericardium and mediastinal pleura) |
| 24
.
| Transversus thoracis muscle (cut across) |
| 25
.
| Rectus abdominis muscle |
