Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is normal . The lungs are hyperinflated . Severe emphysema worse in the right lower lobe is better evaluated in prior CT . Small left pleural effusion is unchanged . There is no pneumothorax . Cardiomediastinal contours are midline
    OUTPUT:
    
No acute cardiopulmonary abnormality Severe emphysema