Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are small to moderate left and trace right pleural effusions with overlying atelectasis . Left base retrocardiac opacity likely represents combination of pleural effusion and atelectasis , but underlying consolidation is not excluded . The cardiac and mediastinal silhouettes are stable . Evidence of pulmonary emphysema is again seen . No evidence of pneumothorax is seen .
    OUTPUT:
    
Small to moderate left and small right pleural effusions with overlying atelectasis . Left base retrocardiac opacity likely represents combination of pleural effusion and atelectasis , but underlying consolidation is not excluded in the appropriate clinical setting .