Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , consistent with known history of emphysema . There is bibasilar atelectasis , but no focal consolidation . Scarring is noted at the left lung base . Cardiomediastinal silhouette is normal . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Hyperinflated lungs compatible with history of emphysema .