CT cannot be used to confirm the diagnosis, and diagnosis by CT alone may be misdiagnosed. CT examination is only one of the imaging aspects. The imaging characteristics of tuberculosis make the lesions occur in the post-apical segment of the upper lobe, the dorsal segment of the lower lobe, and the dorsal basal segment, and they are polymorphic, e.g., infiltrating, proliferating, caseous, and fibrocalcified lesions coexisting at the same time, with inhomogeneous densities. Because there are other diseases that may also show these imaging changes, such as pneumonia, lung nodules, and lung cancer, simple CT imaging of TB does not confirm the diagnosis. Tuberculin test, sputum smear for Mycobacterium tuberculosis and other tests should be performed to confirm the diagnosis, and combined with clinical symptoms. If you feel unwell or have abnormal images on CT, you need to go to the hospital for further examination and follow the doctor’s instructions for standardized treatment.