Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear and well expanded . No focal consolidation , mass , pleural effusion , pneumothorax , or pulmonary edema . The heart size is normal . The mediastinum is not widened . The hila are within normal limits . Visualized thoracic spine is unremarkable .
    OUTPUT:
    
No radiographic evidence of acute or chronic tuberculosis .