Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal chest radiographs demonstrate low lung volumes , bilateral moderate pleural effusions and bibasilar atelectasis . The cardiomediastinal silhouette can not be well evaluated due to these other findings , but the heart does not appear enlarged . Mild pulmonary vascular congestion is also noted with some fluid within the minor fissure .
    OUTPUT:
    
Mild pulmonary edema with bibasilar atelectasis . Superimposed infection can not be excluded .