Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . Clips are present in the anterior mediastinum . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Mild subpleural scarring at each lung apex appears unchanged . The lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .