Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . The endotracheal tube tip extends into the prox right mainstem bronchus . Retraction by at least 3 - 4 cm is advised . Nasogastric tube extends into the left upper quadrant . Retrocardiac opacity is concerning for aspiration or pneumonia . Right lung is clear . Cardiomediastinal silhouette is unremarkable . No bony injuries . Clips in the right upper quadrant noted .
    OUTPUT:
    
1 . Endotracheal tube tip extends into the proximal right mainstem bronchus . Retraction by at least 3 - 4 cm is advised . 2 . NG tube appropriately positioned . 3 . Retrocardiac opacity concerning for aspiration or pneumonia .