Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the right PICC terminates in the upper right atrium , and could be retracted by approximately 3 cm for positioning just above the cavoatrial junction . The lungs are otherwise clear and the cardiac , hilar , and mediastinal contours are normal . No pneumothorax .
    OUTPUT:
    
Right PICC tip terminates in the upper right atrium and could be retracted by approximately 3 cm for more appropriate positioning of the approximate cavoatrial junction .