Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette remains enlarged , but bilateral pulmonary edema has dramatically improved with only minimal residual perihilar haziness remaining , accompanied by peribronchial cuffing and pulmonary vascular engorgement . Left retrocardiac opacity has also improved and probably represents a combination of atelectasis and dependent edema . Additional linear areas of atelectasis are noted posteriorly at the lung bases on the lateral view , and there are also small pleural effusions .
    OUTPUT:
    
Marked improvement in pulmonary edema . Improving left retrocardiac opacity , likely atelectasis , but continued followup may be helpful to exclude underlying pneumonia given clinical suspicion for this entity .