Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from 1 day prior , moderate pulmonary edema has improved and pulmonary vascular congestion also improved . Bilateral lower lobe opacities persist . Moderate cardiomegaly . No substantial pleural effusions . No pneumothorax .
    OUTPUT:
    
Overall improvement of the pulmonary edema which is now mild to moderate .