Lung CT shows corded shadows in the same sense as striae, a manifestation of pulmonary fibrosis, often as a consequence and healing manifestation of acute and chronic pulmonary inflammation. Fibrotic lesions in the lungs commonly appear as streaks on CT, which is due to acute and chronic inflammatory diseases in the lungs that damage the lung parenchyma, granulation tissue and scar tissue to repair the lung parenchyma and fibrosis, the density of the repaired part of the lung parenchyma is different from that of the original lung parenchyma, and the image is shown to be streaks on CT examination. Striated images can be seen in lobar pneumonia, interstitial pneumonia, primary tuberculosis, secondary tuberculosis with predominantly cavities, pulmonary schistosomiasis, pneumocystic myofibroblastoma, pneumoconiosis, and so on. Lung CT shows cords and stripes shadow, it is recommended to consult the doctor in time, so as not to miss the disease.