Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . No foreign body is visualized . There is no evidence for pneumothorax , pneumomediastinum or pleural effusion . There is similar mild - to - moderate relative elevation of the right hemidiaphragm . The lungs appear clear .
    OUTPUT:
    
No evidence of acute disease .