Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , ascending aortic replacement and aortic valve replacement . The cardiac silhouette size is mildly enlarged . The mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is identified . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .