Diagnosis
| Structure | Finding |
|---|---|
| Trachea | Midline, no deviation |
| Lung fields | Clear bilaterally - no consolidation, infiltrates, nodules, or masses |
| Lung apices | Clear - no apical scarring, cavitation, or pleural thickening |
| Hila | Normal size and position bilaterally - no hilar lymphadenopathy |
| Cardiac silhouette | Normal size - cardiothoracic ratio <50%, normal configuration |
| Mediastinum | Midline, not widened |
| Costophrenic angles | Sharp and well-defined bilaterally - no pleural effusion |
| Diaphragm | Smooth contours, normal position; normal gastric air bubble under left hemidiaphragm |
| Bones | Ribs, clavicles, and scapulae appear intact - no obvious fractures or lytic lesions |
| Soft tissues | No subcutaneous emphysema |