Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic severe cardiomegaly is unchanged with stable postoperative mediastinal silhouette . Moderate pulmonary edema is minimally improved with particular note of improvement of previously noted heterogenous opacities in the right upper lobe . There is no pleural effusion or pneumothorax . Left pectoral pacer is unchanged in position .
    OUTPUT:
    
Minimal improvement in moderate pulmonary edema with partial clearing of heterogeneous right upper lung opacity .