Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube tip lies approximately 2 .2 cm above the carina . Inspiratory volumes are low , with prominent bibasilar atelectasis . There is been some degree of improvement at the left base as the left hemidiaphragm is now visible . There is upper zone redistribution and mild vascular plethora , slightly more pronounced , but likely accentuated by low inspiratory volumes . Prominence of the cardiomediastinal silhouette is similar to the prior film and also likely accentuated by low inspiratory volumes . No gross effusion , but a small effusion might not be apparent .
    OUTPUT:
    
1 . ET tube tip approximately 2 .2 cm above the carina . 2 . Prominent bibasilar atelectasis , but improvement at the left base compared with 1 day earlier . 3 . Mild vascular plethora , slightly more pronounced .