Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . The endotracheal tube is again seen with its tip at the carina heading towards the right mainstem bronchus . Retraction by at least 2 - 3 cm is recommended . Otherwise no change .
    OUTPUT:
    
ET tube tip at the carina . Recommend 2 - 3 cm retraction for more optimal positioning .