Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild enlargement of cardiac silhouette . The mediastinal and hilar contours are unchanged . Mild pulmonary vascular congestion persists . There are streaky opacities in the lung bases which may reflect atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion and mild bibasilar atelectasis .