Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , pleural effusion or pneumothorax . No pulmonary nodules are identified within the limits of conventional radiography . The pulmonary vasculature is not engorged . The cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
No evidence of active or latent tuberculosis .