Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left internal jugular central venous catheter with tip terminating at the confluence of the brachiocephalic veins . No pneumothorax is identified . Lung volumes remain low . Heart size remains moderately enlarged . Mediastinal and hilar contours are similar . Crowding of the bronchovascular structures remains . Patchy opacities in the lung bases are slightly worse in the interval and may reflect worsening atelectasis . No pleural effusion is present .
    OUTPUT:
    
Left internal jugular central venous catheter tip at the confluence of the brachiocephalic veins . No pneumothorax . Bibasilar atelectasis and low lung volumes .