Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left PICC line may be traced to the origin of the left brachiocephalic , but the tip is not be visualized . There is worsening bibasilar opacification . The upper lung zones are clear . There is no pneumothorax . The cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
Worsening bibasilar atelectasis .