Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , moderate left anterior loculated hydropneumothorax is minimally increased . Lung volumes have improved . Trace left apical pneumothorax persists . Mild subcutaneous emphysema over the left lateral chest wall continues to decrease . Opacity in the right lower lung has improved , likely atelectasis . Worsening opacity at the left lung base , likely atelectasis , though infection can not be definitively exclude
    OUTPUT:
    
1 . Minimally increased moderate left anterior loculated hydropneumothorax . Improved lung volumes . 2 . Persistent trace left apical pneumothorax . 3 . Worsening opacity at the left lung base , likely atelectasis , though possibly reflecting pneumonia . 4 . Improved right lower lung opacity , most consistent with atelectasis .