Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Thoracolumbar posterior rod and screw spinal fixation hardware is present and is similarly positioned compared to prior exam . The heart size is at the upper limits of normal . The mediastinal and hilar contours are within normal limits . The lungs are clear . There is no large pleural effusion or pneumothorax . Gaseous distention of the stomach is noted for which decompression may be beneficial .
    OUTPUT:
    
No acute cardiopulmonary process .