Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been some mild improvement in the amount of pulmonary edema . The heart is mildly enlarged . There small bilateral pleural effusions . There is pulmonary vascular redistribution but the hazy alveolar infiltrate has decreased . However there are dense areas of opacification both lower lobes . It is unclear how much of this is due to volume loss or if focal infectious infiltrates are present .
    OUTPUT:
    
Mild improvement in pulmonary edema but with bilateral lower lobe volume loss / infiltrate