Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A ventriculoperitoneal shunt courses across the right side of the chest , as before . A left upper quadrant fragment is unchanged . The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease .