Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right subclavian central venous catheter with distal tip projecting over the high right atrium versus cavoatrial junction . As on prior , there are low lung volumes . Re-identified are diffuse right lung airspace opacities concerning for pneumonia . The left lung is clear . No pneumothorax . No pleural effusion .
    OUTPUT:
    
Interval placement of a right subclavian central venous catheter with distal tip projecting over the high right atrium versus cavoatrial junction . No pneumothorax . Otherwise , no interval change .