Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , with flattening of the diaphragms , suggesting chronic obstructive pulmonary disease . Subtle increase in interstitial markings bilaterally may relate to underlying pulmonary emphysema although atypical infection is not excluded in the appropriate clinical setting . Bibasilar atelectasis is seen . No large pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal contours are unremarkable . Aortic calcification is seen .
    OUTPUT:
    
COPD . Subtle increase in interstitial markings bilaterally may relate to underlying pulmonary emphysema although atypical infection is not excluded in the appropriate clinical setting .