Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear stable . There are no pleural effusions or pneumothorax . There is small - to - moderate hiatal hernia with an air - fluid level which is better depicted on the frontal views . The osseous structures are unremarkable .
    OUTPUT:
    
No definite evidence of acute disease . Suspected small to moderate hiatal hernia .