Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 00 : 17 is submitted .
    OUTPUT:
    
There has been some interval improvement but persistent mild pulmonary and perihilar edema . In addition , there is more focal consolidation in the retrocardiac area with the suggestion of air bronchograms . These findings may reflect pneumonia or aspiration rather than partial lower lobe atelectasis . Clinical correlation is advised . There are likely small layering pleural effusions , left greater than right . No pneumothorax . Heart remains stably enlarged .