Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are hyperinflated as on prior . Subtle basilar opacities likely represent chronic atelectasis . No large effusion or pneumothorax . Cardiomediastinal silhouette is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Hyperinflated lungs without superimposed pneumonia .