Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right subclavian central venous catheter with tip in the upper / mid SVC . No pneumothorax is identified . Remainder of the chest is unchanged with continued bibasilar opacities , potentially atelectasis though aspiration or infection are not excluded .
    OUTPUT:
    
Right subclavian central venous catheter tip in the upper / mid SVC . No pneumothorax .