Pulmonary texture is mainly composed of pulmonary arteries, and the X-ray shows a dendritic shadow radiating from the pulmonary hilum to the lung field, with a natural course, from thick to thin, and disappearing in the lung field. When the lung texture is increased, the X-ray shows increased density of lung texture, thickening, disorder of travel and abnormal morphology. It can be seen in a variety of cardiopulmonary or connective tissue disorders. It must be analyzed in the context of clinical history. Generally speaking, it is mostly bronchial pathology, except for cardiac disorders. It is recommended to quit smoking. If you have symptoms such as cough and sputum, it is recommended to visit a specialist for regular review. Chronic bronchitis-like changes and emphysema symptoms Chronic bronchitis is characterized by recurrent cough, sputum, heavy in winter and light in summer, increasing year by year, dry and wet rales can be heard in both lungs, and X-rays show enhanced lung texture. Further consultation and treatment at the Department of Respiratory Medicine is required. Emphysema is a common lesion in which both lungs are overinflated and inflated with reduced elasticity, affecting respiratory function. Chronic bronchitis and bronchial asthma are common causes. Patients present with symptoms such as shortness of breath, hypoxia and recurrent lung infections. It can be complicated by pulmonary origin heart disease. Spirometry and spiral CT may improve the detection rate of emphysema, and consultation with respiratory medicine is recommended Pulmonary alveoli Pulmonary alveoli refers to large alveolar emphysema, which is a type of restrictive emphysema. They form when the alveoli are highly distended and the walls of the alveoli rupture and fuse with each other. Small alveoli do not cause symptoms by themselves, and patients with simple alveoli are often asymptomatic; some alveoli may remain unchanged for many years, and some alveoli may gradually increase in size. Asymptomatic pulmonary blisters do not require treatment, and periodic review is recommended.