Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild interval decrease in size of the left pleural effusion . There is overlying atelectasis / consolidation . No pneumothorax is identified . No focal consolidation , pleural effusion or pneumothorax identified in the right lung . There is persisting mild pulmonary edema . The size of the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Minimal interval decrease in size of the left pleural effusion . Persisting retrocardiac opacity likely reflects atelectasis and / or consolidation . Mild pulmonary edema .