Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are persistent small bilateral subpulmonic pleural effusions with probable associated mild atelectasis that has overall decreased . There is no evidence for free air . Additional more band - like areas of minor atelectasis project along the left mid lung at the right base without change . The heart is mildly enlarged . The patient is status post coronary artery bypass graft surgery . The mediastinal and hilar contours appear unchanged .
    OUTPUT:
    
Decreased pleural effusions . No evidence of free air .