When TB is considered on chest radiograph or chest CT, it only means that the lesion found resembles a tuberculous lesion, which is not yet enough to diagnose TB, and most need to be differentiated from diseases such as common inflammatory diseases of the lungs. If your doctor tells you to suspect TB or suspected TB, the first thing you can do is sputum examination, and finding TB bacilli in sputum and a positive culture of TB bacilli is the gold standard to confirm the diagnosis of TB. If there is no sputum, or if repeated sputum tests do not find TB bacteria, you can consider anti-inflammatory treatment for 2-4 weeks and then re-evaluate. PPD, anti-tuberculosis antibodies, and blood sedimentation can also be referred to for the diagnosis of TB.