Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the right internal jugular central venous catheter extends to the upper SVC . A retrocardiac opacity may reflect atelectasis or fullness of the left hilum . No pleural effusion or pneumothorax identified . The size of the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Interval retraction of the right internal jugular central venous line , now projecting over the upper SVC .