Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild - to - moderate pulmonary edema persists and is probably overall similar compared to the earlier exam on ___ accounting for redistribution . Increased opacity in the right lower lung with some silhouetting of the right hemidiaphragm and right heart border is similar to the earlier exam on ___ . The heart size is normal , overall unchanged . The mediastinum is not widened . Cardiac support devices projecting over the hemithorax are unchanged from the most recent exam . No pneumothorax .
    OUTPUT:
    
Unchanged mild - to - moderate pulmonary edema .