Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Interval placement of a right IJ central venous catheter with its tip in the low SVC . Left chest wall pacemaker is again noted with leads extending to the region the right atrium and right ventricle . Lung volumes are low limiting assessment . Lungs remain clear .
    OUTPUT:
    
Right IJ central venous catheter positioned well .