Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacements . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities . Left first rib is again hypoplastic .
    OUTPUT:
    
No acute cardiopulmonary abnormality .