Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The PICC line is now properly placed at the cavoatrial junction . The left lower lobe atelectasis seen on the prior study persists ; however , the right atelectatic base shows improvement . No pleural effusions and no pneumothorax .
    OUTPUT:
    
Tip of the right - sided PICC line is now positioned at the cavoatrial junction .