Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Lower lung opacities have resolved . The lungs appear clear . The heart is normal in size . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Nonspecific air - fluid levels are noted within bowel of the epigastric region . The osseous structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease . Non-specific air - fluid levels in the epigastrium .