Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . Mediastinal and hilar contours are normal . Lungs are clear . Pulmonary vascularity is normal . No pleural effusion or pneumothorax is seen . There is no subdiaphragmatic free air . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .