Obstructive pneumonia CT shows flaky or patchy hyperdense shadows, usually not accompanied by cavities, with segmentation phenomenon, and blurring of the bronchial tubes in the proximal segment is seen. Obstructive pneumonia may be due to airway spasm, airway narrowing, etc. In this case, CT will observe flexion narrow bronchial tubes, resulting in sputum or secretions in the lungs can not be discharged through coughing, bacterial reproduction will have a large amount of exudate in the tissues, which will lead to CT showing patchy hyperdense shadows, and due to the large amount of fluid in the lungs, resulting in blurring of the bronchial appearances on CT. When bronchiectasis is present, a clear double track sign (aka orbital sign) can be observed on CT due to distal bronchiectasis, a condition that can also lead to obstructive pneumonia, mainly due to the inability to expel the exudate. Obstructive pneumonia may also have other manifestations on CT, such as emphysema caused by CT highlights, it is recommended to consult a medical professional, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.