Latent tuberculosis can also be detected by CT examination, but the diagnosis of the disease can not rely solely on CT, but also need to be combined with other test results to determine. Tuberculosis is an infectious disease caused by the tuberculosis bacillus that invades the lungs, but the organism does not develop immediately after infection with the tuberculosis bacillus, and there is a latent period before the disease develops. In the latent period of tuberculosis, through the CT examination can also find hidden lesions, for the diagnosis of tuberculosis and differential diagnosis also has a certain significance and role. However, no matter whether it is in the latent stage or other stages of tuberculosis, CT examination cannot be relied upon to make a clear diagnosis of the disease. The location and extent of the TB lesions can be visualized through CT examination, and the diagnosis of TB can be confirmed when Mycobacterium tuberculosis is found in sputum smears and other tests. Individuals who are diagnosed with TB should actively cooperate with their doctors in treating the disease without delay in order to avoid delaying the disease and spreading the infection.