Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right pleural effusion has substantially decreased , and is now small . A small left pleural effusion is stable . There is no pneumothorax . Severe emphysema with hyperinflation is unchanged . Bilateral postsurgical changes and the appearance of the treated right upper lung field lesion are stable . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Decreased small right pleural effusion . Stable small left pleural effusion Severe emphysema .