Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is no pleural effusion , pneumothorax or focal air space consolidation to suggest pneumonia . Heart size is top normal . The mediastinal contours are unremarkable . A gastric band is noted . Again seen are distended air-filled loops of bowel .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Air-filled loops of bowel appear unchanged from prior . Again , this may represent an ileus , although , a partial obstruction is not excluded .