Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , ascending aortic graft repair , and aortic valve replacement . Heart size is normal . Mediastinal and hilar contours are unchanged with mild tortuosity of the thoracic aorta again noted . Lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities are demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality .