Pulmonary calcification is an imaging manifestation of the lung, which is a “scar” formed after the lung tissue is infected with Mycobacterium tuberculosis. If the diagnosis of calcification is confirmed, it means that the lesion is stable and old, and does not need treatment and will not affect life expectancy. There are two reasons for the appearance of calcified lesions in the lungs: First, after Mycobacterium tuberculosis infects the lungs, the body’s own immunity is strong enough to resist Mycobacterium tuberculosis, which heals on its own and forms calcified foci in the lungs. Second, after Mycobacterium tuberculosis infects the lungs, the human body’s own immunity is weak, or the virulence of Mycobacterium tuberculosis is stronger, and the human body is not strong enough to resist, it will develop into tuberculosis. After regular anti-tuberculosis treatment, the condition of pulmonary tuberculosis is controlled and the lung lesions are absorbed and stabilized to form calcified foci. In either case, it means that tuberculosis is currently in a stable stage and does not require treatment or special handling and will not have an impact on life expectancy. Pulmonary calcification is the calcium salt deposits that appear after the lung infection with Mycobacterium tuberculosis gets better, the lesions have higher density, and the calcification pattern can be of different sizes, round or irregular, showing bone-like density. The appearance of pulmonary calcification images indicates that the tuberculosis is cured and the survival period is the same as that of normal people.