Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are unremarkable . The lungs are well expanded and clear . There is no evidence of a pneumothorax or pleural effusion . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Normal chest x-ray . Specifically , no pulmonary evidence of TB .