Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate endotracheal tube in position with tip 4 .4 cm above the carina , essentially unchanged from previous imaging . There is some opacification at the left lung base again seen , which likely represents atelectasis but can not rule out an effusion . Opacification in the right lung base may represent atelectasis ; however , in appropriate clinical setting , could also be concerning for pneumonia . Cardiomediastinal silhouette is unchanged . There is no pneumothorax or other complication seen . Visualized osseous structures are unremarkable .
    OUTPUT:
    
ET tube in appropriate position . Right basilar opacity could be concerning for pneumonia in the appropriate clinical setting .