Pulmonary films need to look at both the lung window and the mediastinal window. The lung window first looks at the lung texture, whether the trachea and bronchus travel normally, and whether there are clear lesions within each lobe and segment of the lung, such as inflammation, tumors, and other conditions. The mediastinal window mainly looks at whether there are obvious enlarged lymph nodes in the mediastinum, and also whether there are clear occupancies in the mediastinum, such as common tumors in the anterior mediastinum are thymoma and lymphoma, etc. It can also look at whether there is any obvious thickening of the esophagus, and also see whether there are any abnormalities in the chest wall. For female patients, we can observe whether there are obvious masses in the breast, whether there are enlarged lymph nodes in the axillae bilaterally, and whether there are clear abnormalities in the rib cage of the chest, such as fractures, bone destruction, etc.