Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The carina is not well visualized . However , the ET tube tip probably lies approximately 4 .0 cm above the carina . NG tube tip is present , tip extending beneath diaphragm , off film . Right IJ central line tip overlies the upper right atrium . Cardiomediastinal silhouette is probably unchanged , allowing for considerable technical difference . Again seen is upper zone redistribution mild vascular plethora , overall similar to the prior study . There is increased retrocardiac density with obscuration left hemidiaphragm , which may be slightly worse . Clips again noted in the region of the GE junction .
    OUTPUT:
    
Possible slight worsening of retrocardiac opacity . CHF findings are similar to the prior study . Right subclavian central line tip overlies right atrium .