Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post extensive thoracolumbar fusion with ___ rods . There is interval opacification of the stomach and proximal small bowel , in keeping with the recent upper GI barium study . The right - sided Port - A - Cath terminates at the cavoatrial junction . There is a partially calcified aortic knob . The lung volumes remain low . Compared to the most recent chest radiograph , there is interval moderate improvement of the extensive left lower lung opacity . There is no pneumothorax or pleural effusion . There are prominent bilateral hilar opacities , unchanged .
    OUTPUT:
    
No pneumothorax or pleural effusion . Interval moderate improvement of the extensive left lower lung opacification .