Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right internal jugular central venous line which terminates at the cavoatrial junction . An endotracheal tube is in stable position , and an enteric tube terminates in the distal stomach . There has been interval decrease in the low lung volumes causing crowding of the central bronchovascular structures . There is a left retrocardiac opacity which may reflect atelectasis . The cardiac silhouette is stable in size .
    OUTPUT:
    
1 . Appropriate positioning of support lines devices as described above . 2 . Worsening low lung volumes with a left retrocardiac opacity which may reflect atelectasis .