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 . The catheter tip is not clearly visualized though appears to reside within the lower SVC region . Lung volumes are low . No pneumothorax . Otherwise no change .
    OUTPUT:
    
Right IJ placement with tip likely in the mid SVC .