In recent years, with the development of high resolution CT (HRCT), a "lobule" can not be displayed in the original structure of a conventional scan can be obtained more accurate understanding and recognition to some extent. By studying the relevance of pathology and CT images, our understanding of tuberculosis has also deepened. CT and clinical application of new technologies in the diagnosis and identification of tuberculosis, not only enrich the theoretical basis, revised diagnostic concept, but also significantly improve the accuracy of diagnosis