Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of an endotracheal tube with the tip projecting approximately 4 .6 cm above the level the carina . Lung volumes remain low with crowding of the bronchovascular structures . Slight increase in the degree of bibasilar airspace opacities may reflect atelectasis , although aspiration is difficult to exclude . No large pleural effusion or pneumothorax . The cardiomediastinal silhouette is difficult to assess given the low lung volumes , but grossly unchanged .
    OUTPUT:
    
1 . Interval placement of ETT with tip terminating 4 .6 cm above the carina . 2 . Low lung volumes and increased bibasilar opacities . Findings may represent atelectasis , or less likely aspiration .