Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ETT terminates approximately 2 .9 cm above the carina . There is a small left pleural effusion . A retrocardiac opacity , with air bronchograms is identified . The heart size is top - normal . There is no pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . ET tube terminates approximately 2 .9 cm above the carina . 2 . Retrocardiac opacity with air bronchograms . Small left pleural effusion . Findings could be seen with an infectious process .