Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild - to - moderate cardiomegaly is unchanged from prior study . Cardiomediastinal and hilar silhouettes are unchanged . Again there is central pulmonary vascular congestion with mild - to - moderate interstitial edema . There is slightly more conspicious retrocardiac opacity . There are probable tiny effusions . There is no pneumothorax .
    OUTPUT:
    
Mild - to - moderate pulmonary edema . Slightly more conspicious retrocardiac opacity may represent superimposed infectious process given the appropriate clinical circumstance .