Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume and show similar diffuse interstitial disease , now with more confluent opacity at the left base . A right - sided internal jugular catheter terminates in the distal SVC . No pneumothorax is present . The cardiomediastinal silhouette is stable . No gross effusion .
    OUTPUT:
    
Right IJ central venous line tip over distal SVC . No ptx detected .