In the early stages of pulmonary tuberculosis, it can appear on CT imaging as an infiltrative change with predominant exudation at the site of the tuberculosis, such as the post-apical segment of the upper lobe and dorsal segment of the lower lobe. The morphology of the lesion is varied and can be striated, blotched, patchy, flocculent, or may appear as a sprouting sign. The morphology around the lesion is well defined and changes slowly, and can be accompanied by enlargement of hilar or mediastinal lymph nodes. If the patient has clinical symptoms but no other clinical data, such as sputum culture, alveolar lavage, bronchoscopy, tuberculin test, TSPOT, etc., are available. The patient may also need to be given a therapeutic diagnosis and regular antituberculosis treatment for suspected TB. If there is absorption of the lesion after anti-tuberculosis treatment, it also proves that the patient has tuberculosis.