Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improvement of bibasilar opacities since prior . There is no large effusion or pneumothorax . A right - sided central venous catheter seen with tip at the cavoatrial junction . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Right IJ line with tip at the cavoatrial junction . No pneumothorax .