Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . No subdiaphragmatic free air is identified . Stent is seen within the region of the common bile duct . No acute osseous abnormalities are demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality .