Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Support and monitoring devices are in unchanged position with the endotracheal tube terminating 2 .5 cm above the carina in unchanged position . There has been worsening of opacity at the right lung base with slight rightward shift of mediastinal structures . The cardiac silhouette is unchanged . There is no pneumothorax .
    OUTPUT:
    
1 . ET tube terminates 2 .5 cm above the carina in appropriate position . 2 . Markedly interval progression of opacity at the right lung base which may represent a combination of atelectasis and pleural effusion , although superimposed pneumonia / aspiration is also possible in the appropriate clinical setting .