Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiographs were obtained . The lungs are low in volume giving the appearance of bronchovascular crowding , and there is relatively mild basal atelectasis . Endotracheal tube is 2 .2 cm above the carina and should not be advanced further . Nasogastric tube courses into the stomach . The heart is normal in size with normal mediastinal and hilar contours .
    OUTPUT:
    
Endotracheal tube , 2 .2 cm above the carina , should not be advanced further . Basal atelectasis .