Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is normal . Mediastinal and hilar contours are unremarkable . Minimal bibasilar atelectasis is noted . No focal consolidation , pleural effusion or pneumothorax is present . There are dilated loops of small bowel noted within the abdomen . Previously seen pneumoperitoneum is not clearly visualized on the current exam .
    OUTPUT:
    
Previously noted pneumoperitoneum on outside abdominal radiograph performed the same date not clearly delineated on the current exam . Persistently dilated small bowel loops concerning for obstruction . Mild bibasilar atelectasis in the setting of low lung volumes .