Pulmonary fibrous striae foci generally refer to a description seen on the chest X-ray lung, CT report card, as follows: 1. Pulmonary CT description: generally not a big problem, often due to pneumonia or tuberculosis after treatment lesion absorption left scar, mostly seen in old tuberculosis. If there are also calcified foci, they are usually due to old foci left by regular anti-TB treatment of TB, which is a manifestation of TB healing, and in some patients pneumonia cannot be completely absorbed, leaving a fibrous stripe shadow; 2. Chest X-ray report: it is best for the subject to have a CT of the lungs again to make sure it is indeed a fibrous stripe foci, because chest X-ray images sometimes hide other lesions and are not accurate enough. Fibrous streak foci in the lungs should not be confused with interstitial lung disease, which is very different from each other. Interstitial lung disease is usually associated with lattice shadows, ground glass shadows, thickened lobular septa, stretched branches, and even cellular lung, and the pathogenesis of the two is completely different.