Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No radiopaque foreign body is demonstrated . The heart size is normal . Mediastinal and hilar contours are unremarkable , and no pneumomediastinum is identified . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No radiopaque foreign body identified .