Chest ortho and lateral radiographs are a means of X-ray examination and belong to one of the more commonly used examinations in physical examinations and routine chest examinations. Ortho- and lateral chest films can examine the trachea, heart, lungs, mediastinum, chest cavity, etc. The specific examinations are as follows: 1) to see whether there is any abnormality in the trachea and the position of the intubation tube; 2) whether the shape of the large blood vessels of the heart is normal and whether there is any abnormality in the size and shape of the heart shadow; 3) whether there is any abnormal inflammation, swelling, and solid lung changes in the lungs; 4) whether there is any occupancy and deviation in the mediastinum; 5) whether there is any accumulation of fluid and gas in the pleural cavity, Whether there is fluid and gas accumulation inside the pleural cavity. The frontal and lateral chest radiographs can reveal the presence of tumors, pleural effusion, tuberculosis, and abnormalities at the rib cage. To sum up, there are more diseases that can be examined in frontal and lateral chest radiographs.