Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . Right CP angle is excluded . The nasogastric tube is seen with its tip in the proximal stomach . The lungs remain clear bilaterally . The cardiomediastinal silhouette appears grossly unremarkable . Bony structures are intact .
    OUTPUT:
    
No acute intrathoracic process . Appropriately positioned nasogastric tube .