Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . The endotracheal tube is seen with its tip located at least 5 .7 cm above the carina . Advancement is advised for more optimal positioning . The nasogastric tube descends into the left upper quadrant . There is left lower lobe atelectasis , difficult to exclude a component of aspiration or pneumonia . Otherwise lungs are clear . Heart size appears within normal limits . Mediastinal contour is unremarkable . No acute bony abnormalities are seen .
    OUTPUT:
    
High riding endotracheal tube , please advance by at least 2 cm for more optimal positioning . NG tube positioned appropriately . Left lower lobe atelectasis versus aspiration .