Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright frontal view of the chest . There has been marked improvement in the interstitial pulmonary edema seen one day prior . Mild cardiomegaly persists . Likely tiny bilateral pleural effusions are seen . No pneumothorax .
    OUTPUT:
    
Definite improvement in the pulmonary edema since one day prior .