Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and mitral valve replacement . Cardiac silhouette size is normal . The mediastinal and hilar contours are unchanged and within normal limits . The pulmonary vascularity is not engorged . The lungs are hyperinflated with relative lucency in the lung apices compatible with underlying emphysema . Subsegmental atelectasis in the left lung base is similar compared to the prior study . No focal consolidation is identified . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .