Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . The heart size is normal . The hilar mediastinal contours remain within normal limits . This is small left and moderate right pleural effusion , both unchanged since ___ . Linear bibasilar opacities reflect adjacent compressive atelectasis . There is no pneumothorax . The central pulmonary vessels are not engorged . Mild pulmonary edema seen on the ___ study appears improved
    OUTPUT:
    
Improved mild pulmonary edema . Unchanged moderate right and small left pleural effusions .