Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . A round opacity overlying the posterior spine on the lateral view represents hypertrophic facet joint arthropathy at T8 - T9 seen on the prior CT . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
Normal radiograph of the chest .