Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The overall appearance of the chest is similar compared to the prior study , with perhaps mild interval increase in interstitial prominence . Pulmonary vascular congestion persists , and moderate cardiomegaly is unchanged . Retrocardiac opacity is re - demonstrated , and not significantly changed . Sternotomy wires and mediastinal clips are stable .
    OUTPUT:
    
1 . Overall similar appearance of the chest compared to the prior study with mildly increased interstitial edema . 2 . Persistent retrocardiac opacity , compatible with recently diagnosed community - acquired pneumonia . Repeat after treatment suggested to document resolution .