Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal bibasilar atelectasis , improved since previous . No new consolidations identified . Mild pulmonary vascular congestion . No pleural effusion or pneumothorax . The size of the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Interval decrease in the bibasilar opacities . Mild central vascular congestion .