Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The pulmonary vascularity is normal . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormalities are visualized . No free air is noted under the diaphragms .
    OUTPUT:
    
Normal chest radiograph .