Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable view of the chest demonstrates ET tube terminating 3 .5 cm above the carina . The NG tube is positioned within the stomach . The lung volumes are low , which accentuate bronchovascular markings . Hilar and mediastinal silhouettes are prominent , which likely relate to technique and low lung volumes . The heart is mildly enlarged . Perihilar vascular congestion is noted . There is no pneumothorax . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Appropriately positioned endotracheal and nasogastric tubes . Low lung volumes .