Chest radiographs are one of the X-ray examinations and the most commonly used means of imaging, with a small radiation dose, and are very commonly used in clinical work. In case of fever, cough, chest pain, chest tightness, etc., the condition of the lungs can be initially determined by taking a chest plain film. Chest radiographs can assist doctors in diagnosing whether there is inflammation, tuberculosis, pneumothorax, bronchial dilatation, and lung tumors in the lungs, etc. In case of acute trauma, it is also possible to initially determine whether there is a fracture of the ribs by taking chest plain radiographs, and to conduct a follow-up examination if necessary.