Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was obtained . Compared with the previous examination a similar degree of perihilar opacity with slight decrease in interstitial thickening is consistent with moderate pulmonary edema . The density of the left lower lobe / retrocardiac opacity is such that an infectious consolidation may be obscured in this area . Bilateral pleural effusions are unchanged . The heart remains mild to moderately enlarged with calcified aortic knob .
    OUTPUT:
    
Minimally improved moderate pulmonary edema with more confluent retrocardiac opacity , potentially reflecting obscured pneumonia . Consider conventional 2 view radiographs after diuresis to better assess this area .