Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The appearance of the right lung is significantly improved from the prior study . There is a small right pleural effusion seen and persistent opacity at the right base . The left lung is also better appearing with some persistent retrocardiac opacity and left lower lobe atelectasis . Left pleural effusion is also improved . The cardiomediastinal and hilar contours are grossly unchanged . There is no pneumothorax .
    OUTPUT:
    
Improved appearance of the lungs bilaterally with small residual right pleural effusion .