Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are normal . Pulmonary edema seen on ___ exam , has resolved . Small left pleural effusion persistents . Hilar and mediastinal silhouettes are unchanged . Heart size is top - normal . Retrocardiac opacity is unchanged since ___ and may represent atelectasis or infection in theappropriate clinical setting . No focal consolidation or pneumothorax .
    OUTPUT:
    
Pulmonary edema seen on ___ exam has resolved . No focal consolidation . Retrocardiac opacity may represent atelectasis or infection in the appropriate clinical setting .