Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying support devices obscure the film . The patient is rotated . The endotracheal tube is seen at the level of the carina approaching the right mainstem bronchus and should be retracted . The nasogastric tube is coiled in the neck . The right lung is clear . The heart is likely within normal limits given rotation . There is a left retrocardiac opacity . The lungs are otherwise clear without pneumothorax .
    OUTPUT:
    
1 . The endotracheal tube ends in the right mainstem bronchus . The nasogastric tube is coiled in the neck . 2 . A retrocardiac cardiac opacity could represent atelectasis , infection or aspiration .