Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . The lungs are hyperinflated with upper lobe lucency and splaying of bronchovasculature compatible with emphysema . No large consolidation , effusion or pneumothorax . The cardiomediastinal silhouette is stable . Bony structures are intact .
    OUTPUT:
    
Emphysema without definite signs of superimposed pneumonia .