Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is similar to prior . Upper zone redistribution is again noted , but doubt overt CHF . Patchy increased retrocardiac opacity is again seen , similar to prior , compatible left lower lobe collapse and / or consolidation . Minimal atelectasis at the right lung base is more pronounced . Equivocal small left effusion . Blunting of the right costophrenic angle raises question of a small right effusion .
    OUTPUT:
    
Essentially unchanged . Minimal atelectasis and possible small right effusion are slightly more pronounced on today 's examination .