Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pleural effusion has decreased in size with persistent left lower lobe atelectasis and associated elevation of the left hemidiaphgram . Patient is status post median sternotomy and CABG . No pneumothorax is identified . A stable small right pleural effusion is again seen . The cardiac size remains top normal .
    OUTPUT:
    
Interval small decrease in the left pleural effusion with left lower lobe atelectasis . Stable small right pleural effusion .