Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest are obtained . There is interval placement of a weighted nasogastric tube , which courses below the diaphragm , terminating in the expected location of the stomach . There is persistent elevation of the right hemidiaphragm . Right base streaky opacity most likely represents chronic atelectasis as has been seen on multiple priors . Mild left base atelectasis is seen . There is no pleural effusion or pneumothorax . Lucency under the right hemidiaphragm persists ; again possible air-fluid collection vs interposition of bowel vs free air .
    OUTPUT:
    
Interval placement of a weighted nasogastric tube , coursing below the diaphragm , terminating in the expected location of the stomach . Lucency under the right hemidiaphragm persists ; again possible air-fluid collection vs interposition of bowel ( although not see on studies prior to this date ) vs free air .