Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable upright frontal chest radiograph demonstrates intact sternal wires , unchanged . The cardiac silhouette is again mildly enlarged . Bilateral diffuse opacity are improved compared to ___ , consistent with improved mild pulmonary edema . Bilateral pleural effusions are mildly improved . There is no pneumothorax . The visualized upper abdomen is unremarkable , except for right upper quadrant clips suggestive of prior cholecystectomy .
    OUTPUT:
    
Improvement of mild pulmonary edema and bilateral pleural effusions .