Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ET tube is present , tip approximately 3 .9 cm above the carina . An NG tube is present . The tip is difficult to trace , but it appears to extend beneath the diaphragm , beyond the inferior edge of the film . Allowing for considerable rotation due to scoliosis , the right PICC line tip overlies the distal SVC near the SVC / RA junction . There is possible minimal upper zone redistribution , but no overt CHF . There is patchy increased retrocardiac density , slightly improved compared with 1 day earlier . Otherwise , no focal infiltrate . No gross effusion .
    OUTPUT:
    
Continued left retrocardiac density , consistent with left lower lobe collapse and / or consolidation , slightly improved compared with 1 day earlier . Possible minimal upper zone redistribution . Lines and tubes as described .