Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate upper thoracic rod and screw posterior fixation with disc spacers in place . The heart is normal in size . The mediastinal and hilar contours are unremarkable . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . Expansile sclerotic appearance of the left anterior third rib appears unchanged .
    OUTPUT:
    
No evidence of pneumonia .