II. Pathophysiology
- Straight lines are not normally found on Chest XRay
III. Interpretation: Vertical lines on Chest XRay
- Pneumothorax
- Artifact
- Skin fold
- Extend beyond rib margins
- Only one definable edge
- Fade gradually into tissue without abrupt termination
IV. Interpretation: Perfectly horizontal lines - Air-Fluid interface
-
Lung
-
Lung Abscess
- Does not extend to chest wall
- Same diameter on PA and lateral
- Cyst
-
Lung Abscess
- Pleural Space
- Hydropneumothorax
- Empyema
- Extends to thoracic limit
- Disproportionately lengthy in one projection