Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Improved lung volumes . An air - fluid level along the lateral wall of the right lung is concerning for residual empyema . Atelectasis and effusion at the right lung base are unchanged . Mild atelectatic changes are unchanged at the left lung base .
    OUTPUT:
    
1 . An air - fluid level along the lateral wall of the right lung is concerning for residual empyema . 2 . Small to moderate atelectasis and effusion at the right lung base are unchanged from the prior examination .