Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant change compared to the prior exam . The lungs are expanded and clear . There is no pleural effusion , pneumothorax , or focal consolidation . The cardiomediastinal silhouette , pulmonary vasculature , hila , and pleura are normal . There is no acute osseous abnormality .
    OUTPUT:
    
Normal chest radiograph . No radiographic evidence for active or latent pulmonary TB .