Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval decrease in size of the right pleural effusion , now small in extent . Opacity in the right lower lung zone likely reflect atelectasis and residual pleural fluid . There is no pneumothorax identified . There persisting opacities centrally in the left lung . Small left pleural effusion . The size and appearance of the cardiac silhouette is unchanged .
    OUTPUT:
    
Interval decrease in size of the right pleural effusion , now small in extent . Right lower lung zone opacities likely reflect atelectasis and pleural fluid . No pneumothorax identified . Unchanged appearance of the left , predominantly perihilar , airspace opacities .