Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs are hyperinflated with upper lobe lucency compatible with known severe emphysema . There is no focal consolidation concerning for pneumonia . No large effusion or pneumothorax . No signs of edema or congestion . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Severe emphysema without superimposed pneumonia .