Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pigtail drainage catheter has been removed . Lung volumes remain low with increased bibasilar atelectasis . Left lower lobe opacifications are slightly improved . Loculated air overlying the spine at site of prior drainage catheter remains without evidence of worsening collection . The moderate left - sided pleural effusion is stable . No pneumothorax .
    OUTPUT:
    
1 . No pneumothorax . 2 . Slightly improved left lower lobe opacities 3 . Stable moderate left pleural effusion .