Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A nasogastric tube tip is located within the stomach . Heart size is top normal . Mediastinal and hilar contours are unremarkable . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . Pulmonary vasculature is normal . Mild degenerative changes are noted in the thoracic spine . Excreted contrast material from recent CT exam is noted within the collecting systems bilaterally . Multiple dilated loops of small bowel are compatible with known small bowel obstruction .
    OUTPUT:
    
Nasogastric tube tip within the stomach . Persistent small bowel obstruction .