Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unchanged with prominence of the right hilum . There are mild bibasilar opacities , likely atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Multilevel degenerative changes in the thoracic spine are again noted .
    OUTPUT:
    
Mild bibasilar atelectasis .