Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , mild interstitial pulmonary edema has improved , however there is increased central vascular enlargement . There is also persistent left retrocardiac atelectasis . Bilateral small pleural effusions are also stable . The heart is mildly enlarged .
    OUTPUT:
    
Slight interval improvement of interstitial pulmonary edema with worsening central pulmonary vascular congestion .