Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from earlier today , there has been interval placement of an endotracheal tube which terminates in the right mainstem bronchus . Lung findings otherwise remain unchanged . There is no pneumothorax .
    OUTPUT:
    
Endotracheal tube terminates in the right mainstem bronchus , withdrawal is recommended for appropriate positioning . These findings were discussed with ___ by ___ via telephone on ___ at 16 : 13 , time of discovery .