Hyperlucent Lung
Factors
Vasculature: Decrease
Air: Excess
Tissue : Decrease
Bilateral diffuse
Emphysema
Asthma
Unilateral
Swyer James syndrome
Agenesis of pulmonary artery
Absent breast or pectoral muscle
Partial airway obstruction
Compensatory hyperinflation
Localized
Bullae
Westermark's sign : Pulmonary embolus