Patchy calcified foci in the chest are usually considered to be old lesions, which are calcified foci found in the lungs in the shape of patches, increased density shadows, or spots during chest imaging such as X-ray or CT. Most of these changes belong to previous pneumonia, inflammation absorption, mechanization and left behind, usually does not cause symptoms, just need to regularly review the chest imaging can be. Calcified foci in the lungs are now being detected more frequently because of the widespread use of chest CT examinations, which have a higher detection rate than before. Calcified foci in the lungs generally do not get worse and do not disappear for no reason, so there is no need to worry too much about calcified foci found on chest CT.