Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes are noted . Left - sided central venous catheter tip projects over the upper SVC . There is no visualized pneumothorax . Blunting of the left costophrenic angle could be due to atelectasis or effusion . Cardiomediastinal silhouette is unchanged . Median sternotomy wires and mediastinal clips are again noted .
    OUTPUT:
    
Left - sided central venous catheter with tip projecting over the upper SVC .