Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lines and tubes in standard position . The bibasilar atelectasis has improved . The lungs are otherwise clear . Mild postoperative widening of the cardiac silhouette is stable . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
1 . Lines and tubes in standard position , without pneumothorax . 2 . Improving bibasilar atelectasis .