Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No new focal parenchymal opacity . The left basal opacity has improved . Mild pulmonary edema has worsened when compared to the prior exam . Moderate cardiomegaly . Layering opacity seen best on the lateral view , is favoured to represent a moderate left sided effusion .
    OUTPUT:
    
Interval worsening of the mild pulmonary edema . Moderate left pleural effusion layering posteriorly . The left basal opacity representing atelectasis / consolidation has improved .