II. Pathophysiology
- Infiltrates within the air spaces (Bronchioles, alveoli)
- Pulmonary vessels are obscured (contrast with Interstitial Infiltrate)
III. Signs
- Segmental distribution of Pulmonary Infiltrate
- Coalescence of infiltrates
- Fluffy margins
- Air Bronchograms
- Rosette Patterns
- Silhouetting of normal structures