Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . The chest is hyperinflated . There is no pleural effusion or pneumothorax . Mild subpleural thickening at each lung apex appears unchanged . Otherwise the lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease . Hyperinflation .