Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is mildly enlarged and has increased in size since the prior study . This is accompanied by new pulmonary vascular engorgement , peribronchial cuffing and vascular indistinctness . Also new is a confluent area of opacity in the left retrocardiac region with a few air bronchograms , accompanied by a small - to - moderate left pleural effusion . Focal area of scarring in the right mid lung appears unchanged .
    OUTPUT:
    
1 . New pulmonary vascular congestion with mild interstitial edema . 2 . Left lower lobe opacity , which could be due to either atelectasis or infectious pneumonia , accompanied by a small - to - moderate pleural effusion .