Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes is slightly low . The lungs are clear . No focal consolidation , edema , effusion , or pneumothorax . The heart size is normal . The mediastinum is not widened . The trachea and bilateral mainstem bronchi appear normal in caliber . Levoconvex scoliosis of the thoracic spine is mild . No acute osseous abnormality . No evidence of a radiopaque foreign body .
    OUTPUT:
    
No evidence of radio - opaque foreign body in the airways . The lungs are clear .