Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The nasogastric tube deviates to the left at the level of the left mainstem bronchus ; however , comparison to the most recent chest CT shows that the stomach is intrathoracic and positioned immediately below the left mainstem bronchus and therefore , the tip of the NGT likely resides within the stomach . The large opacity at the left lung base containing an air - fluid level represents the herniated stomach . The right lung is clear without focal opacity , pleural effusion or pneumothorax . There is no focal opacity within the visualized portions of the left lung . No pleural effusion or pneumothorax . The heart size is normal . There is no free air beneath the right hemidiaphragm . There is no acute osseous abnormality .
    OUTPUT:
    
The nasogastric tube ends in the expected location of the intrathoracic stomach . Please refer to subsequent CT Chest for further details .