Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an ET tube approximately 4 .5 cm from the carina . A right IJ central line terminates in the right atrium . NG tube is unchanged in position . Since prior radiograph , there has been no new parenchymal infiltrates . Lung volumes are again low . Retrocardiac opacity is unchanged , likely atelectasis .
    OUTPUT:
    
1 . ET tube 4 .5 cm from the carina . 2 . Right IJ central line in the right atrium . 3 . No new parenchymal infiltrates .