Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is dense opacification of the right lung base representing a combination of pleural effusion and atelectasis , overall improved compared to prior . There is increased opacification in the region of prior effusion , likely representing re-expansion edema . There is no left - sided pleural effusion . The cardiomediastinal silhouette is normal . There is no focal lung consolidation .
    OUTPUT:
    
Small right pleural effusion , decreased in size from ___ with increased opacification at the right lung base , most compatible with re-expansion edema . .