Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the right PICC line projects over the superior cavoatrial junction . No significant interval change in the the bilateral diffuse and confluent air space opacities . The size of the cardiac silhouette is within normal limits . No pleural effusion or pneumothorax identified .
    OUTPUT:
    
No significant interval change since the prior exam .