Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . The cardiac silhouette is enlarged , but stable . The mediastinal and hilar contours are within normal limits . The lungs are slightly hyperinflated without focal consolidation concerning for pneumonia , pleural effusion or pneumothorax . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary process .