Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are normal . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is present . There is no free air under the diaphragms . The osseous structures are unremarkable .
    OUTPUT:
    
Normal chest radiograph . No free air under the diaphragms .