Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is similar mild - to - moderate relative elevation of the right hemidiaphragm with an anterior eventration , relative to the left side . There is no pleural effusion . No pneumothorax is demonstrated .
    OUTPUT:
    
No evidence of acute disease including no evidence for pneumothorax .