Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . The lungs are hyperinflated , but no consolidation , pulmonary nodule or mass is seen . The pleural surfaces are smooth , without pleural effusion or pneumothorax .
    OUTPUT:
    
Emphysema . No acute cardiopulmonary pathology .