Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hyperinflated lungs are consistent with obstructive disease . There is no focal consolidation , pleural effusion or pneumothorax . Mild scarring at the right base , unchanged . Mediastinal and hilar contours , including prominence of the pulmonary arteries , are unchanged . Heart size is normal .
    OUTPUT:
    
No evidence of pneumonia . Hyperinflated lungs are suggestive of emphysema .