Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs are hyperinflated and hyperlucent compatible with known underlying emphysema / COPD . No focal consolidation is seen to suggest pneumonia . No large effusion or pneumothorax . No edema or congestion . The heart and mediastinal contours appear normal and stable . Bony structures are intact .
    OUTPUT:
    
Emphysema without superimposed acute process .