Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An NG tube is present , tip curled in the gastric fundus . A right subclavian PICC line tip overlies the SVC / RA junction , more distal than on the prior film . No pneumothorax detected . There are low inspiratory volumes . Cardiomediastinal silhouette is slightly prominent , but unchanged and likely accentuated by low lung volumes . There is upper zone redistribution and mild vascular plethora . There is increased retrocardiac density , consistent with left lower lobe collapse and / or consolidation , similar to the prior study . There is minimal atelectasis at the right lung base . Right hemidiaphragm is elevated , but unchanged . No gross effusions .
    OUTPUT:
    
1 . Right PICC line lies more distal on the prior film , at the SVC / RA junction . 2 . Left lower lobe collapse and / or consolidation similar , possibly slightly more pronounced , than on the prior film . 3 . Upper zone redistribution and mild vascular plethora , also may be slightly more pronounced . No overt CHF . 4 . Minimal atelectasis at the right lung base is probably also slightly more pronounced .