Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-upright view of the chest was reviewed and compared to the prior study . The nasogastric tube is in proper position with its most proximal side port located in the stomach . There are two additional lines that are known to be external . Left lower lung atelectasis is minimal ; otherwise , the lungs are clear . Normal heart , pleural , and mediastinal surfaces .
    OUTPUT:
    
Nasogastric tube is in proper position with the most proximal side port located in the stomach .