Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from 1 day prior , mild - to - moderate pulmonary edema is slightly improved . Mild to moderate bilateral pleural effusions with bibasal opacities have not significantly changed given for differences in technique . Moderate to severe cardiomegaly .
    OUTPUT:
    
Mild to moderate pulmonary edema , has slightly improved . Bilateral pleural effusions and bibasal opacities are unchanged .