Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , which results in bronchovascular crowding . Right perihilar opacity may represent atelectasis or aspiration . Cardiomediastinal and hilar contours are unchanged . Endotracheal tube ends 4 .3 cm from the carina . A nasogastric tube courses into the stomach , with the last side port at the GE junction . No pneumothorax .
    OUTPUT:
    
1 . Right perihilar opacity may represent atelectasis or aspiration . 2 . Unremarkable position of the endotracheal tube . 3 . Nasogastric tube ends in the stomach , with the last side port at the GE junction . This should be advanced prior to use .