Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal contours are unremarkable . There is mild pulmonary vascular congestion with mild perihilar haziness , new from the prior exam . Streaky opacities in the lung bases likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is visualized . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion and bibasilar atelectasis .