Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right internal jugular central venous catheter terminates immediately upstream of the cavoatrial junction . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . The lung volumes are low . The lungs appear clear .
    OUTPUT:
    
Central venous catheter terminating in the lower superior vena cava . No evidence of acute disease . No pneumothorax .