Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . The heart size demonstrates a left ventricular configuration and is top normal in size . The mediastinal and hilar contours are unremarkable . Lungs are clear . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes in the thoracic spine with anterior osteophyte formation .
    OUTPUT:
    
No acute cardiopulmonary process .