Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from the same day . Mild to moderate decrease in the left - sided pleural effusion . Left upper lobe peripheral mass and coarse reticular opacities unchanged . Right lower lobe reticular opacities also unchanged . No pneumothorax .
    OUTPUT:
    
Mild to moderate decrease in left - sided pleural effusion . No pneumothorax .