Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 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 . The lungs appear clear . There is no free air or pneumomediastinum . There is a ventriculoperitoneal shunt , which courses across the right anterior chest and terminates in the left upper quadrant of the abdomen . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .