Double lung texture thickening What does that mean?

Normal thickening of bilateral lung markings refers to thickening of the bronchovascular bundles on a chest radiograph or chest CT. Thickening of bilateral lung markings may sometimes be caused by bronchial lesions of bronchitis, or it may be caused by lung interstitium, such as interstitial pulmonary edema caused by chronic cardiac insufficiency, which may also cause thickening of bilateral lung markings. It is even necessary to note that some healthy people may report thickening of bilateral lung markings when taking a chest radiograph. Therefore, simple thickening of bilateral lung markings is of little significance and needs to be analyzed in combination with the patient's clinical symptoms. Sometimes, chest CT examination is needed to further evaluate whether there is thickening of bilateral lung markings.