Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiac , mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . The lungs appear clear . ___ rods span the thoracic spine with laminar hooks superiorly among multiple levels and pedicle screws along lower thoracic levels . No fracture is identified .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease or injury .