Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low and there is bibasilar atelectasis . Otherwise , the lungs are clear without focal opacities , pleural effusion or pneumothorax . The cardiac and mediastinal contours are stable . A vascular stent projects over the trachea . A nasogastric tube ends in the stomach .
    OUTPUT:
    
No pneumothorax . A nasogastric tube ends in the stomach .