Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is again a large anterior eventration of the right hemidiaphragm , not significantly changed . A streaky opacity at the right lung base suggests unchanged atelectasis associated with the eventration . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .