Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube terminates in the proximal trachea at the level of the thoracic inlet . Cardiomediastinal contours are normal . Lungs and pleural surfaces are clear . Post-operative changes are present in the lower cervical and upper thoracic spine .
    OUTPUT:
    
No radiographic evidence of pneumonia .