Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Right PICC terminates at the superior cavoatrial junction . NG tube terminates below the diaphragm . Lung volumes have improved since ___ , though still low . Atelectasis of the left base is small . No substantial pleural effusion or pneumothorax . Heart size and cardiomediastinal contours are stable .
    OUTPUT:
    
Right PICC terminates at the superior cavoatrial junction . The PICC may be withdrawn by 1 cm for position in the low SVC .