Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . Coronary artery stent is again noted . The mediastinal and hilar contours are unremarkable , with mild tortuosity of the thoracic aorta . Lungs are clear . No pleural effusion or pneumothorax is identified . There is no pulmonary vascular congestion . The osseous structures demonstrate no acute abnormality . No free air is noted under the diaphragms .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .