Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mildly enlarged . There are new bilateral lower lobe infiltrates and small bilateral pleural effusions . There is pulmonary vascular redistribution ill - defined vascularity
    OUTPUT:
    
Pulmonary edema , new compared to prior . An underlying infectious infiltrate in the lower lobes ca n't be totally excluded