Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . A small hiatal hernia is noted . The mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . No subdiaphragmatic free air is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Small hiatal hernia .