Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ETT tip ends 5 cm from the carina . Enteric tube traverses the diaphragm into the left upper quadrant expected region of the stomach which appears distended . Lung volumes are low . Retrocardiac opacity could be atelectasis . No pleural effusion , edema , or pneumothorax . The heart size is normal . The mediastinum is not widened . No evidence of acute osseous abnormality .
    OUTPUT:
    
1 . ETT tip ends 5 cm from the carina . 2 . Retrocardiac opacity could be atelectasis . 3 . Low lung volumes .