Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and probably coronary artery bypass graft surgery . The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged , including a prominent left - sided epicardial fat pad . The lung volumes are low . Streaky lingular opacity suggesting minor atelectasis or scarring appears unchanged . Minimal blunting of the right costophrenic sulcus is more suggestive of similar slight atelectatic change , less likely persistent trace pleural effusion . There has been no significant change .
    OUTPUT:
    
No evidence of acute disease .