Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains moderately enlarged . The mediastinal contour is unchanged . There is persistent moderate interstitial pulmonary edema with perihilar haziness . Small bilateral pleural effusions are present , perhaps new from the prior study . Retrocardiac opacity may reflect atelectasis . No pneumothorax is identified . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Persistent moderate interstitial pulmonary edema . Small bilateral pleural effusions . Retrocardiac opacity may reflect atelectasis though infection can not be excluded .