Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is probably at the upper limits of normal size given technique . The mediastinal and hilar contours are unremarkable . The left costophrenic sulcus is partly excluded , but there is no indication of pleural effusion . The lungs appear clear . No free air is demonstrated .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease or free air .