Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are persistently low . The cardiac silhouette size remains mildly enlarged . The mediastinal contour is stable with unfolding of the thoracic aorta . Since the prior study , there is new mild interstitial pulmonary edema . Blunting of the costophrenic angles bilaterally suggests small bilateral pleural effusions . Retrocardiac opacity also appears progressed , and could reflect an area of worsening atelectasis though infection can not be completely excluded . Eventration of the right hemidiaphragm persists . No pneumothorax is identified .
    OUTPUT:
    
Mild interstitial pulmonary edema , new compared to the prior study , and small bilateral pleural effusions . Worsening retrocardiac opacity likely reflects increasing atelectasis , but infection can not be completely excluded .