Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A linear density again seen in the left mid to lower lung is consistent with scarring . The lungs appear hyperinflated suggestive of underlying emphysema . No focal consolidation , effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Emphysema without superimposed pneumonia .