Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is noted at the origin of the right mainstem bronchus , retraction by 4 cm is recommended . Nasogastric tube appears coiled in the stomach . There is left lower lobe collapse . Otherwise , the lungs are clear with no evidence of other consolidations or effusions . Cardiomediastinal silhouette appears within normal limits . The aortic arch appears prominent .
    OUTPUT:
    
1 . Endotracheal tube is at the origin of the right mainstem bronchus and retraction is recommended . 2 . Left lower lobe collapse which in this case may be due to aspiration given the patient 's history .