What is perspective?

The most commonly used X-ray examination in clinic is chest X-ray and chest fluoroscopy. Because the lung contains air, under normal circumstances, the lung tissue and structure can be easily compared with the surrounding organs and tissues, and X-rays can pass through the air but not through the substantive organs. Therefore, through comparison, it is easy to diagnose chest diseases, such as the most common infectious diseases, bronchitis, pneumonia, as well as lung abscess, atelectasis, pleural effusion or space-occupying consolidation of the lungs, which can be clearly diagnosed at a glance. Of course, for some complex diseases, other special examinations should be supplemented when necessary, such as angiography and tomography. In addition to the most conventional chest radiograph, we can also do lateral and oblique positions to understand the lesion site, the relationship between the lesion and the heart, or the size of each atrium and ventricle of the heart from different angles.

Sometimes the doctor will let the child have a chest X-ray first. When the chest X-ray penetrates the chest of the sick child and shines on the fluorescent screen, the doctor can directly observe the lesion. Its advantages are fast and economical, and it can rotate the body position according to the condition, understand the various conditions of the lesion, get the X-ray report quickly and make a diagnosis in time. The disadvantage is that sick children and doctors have been exposed to X-rays for a long time, which has to be said to be harmful to their health. In addition, due to the limitation of fluorescent screen and lamp conditions, especially the radiologist's own experience, it is subjective to some extent; Children who rotate for a long time, especially young children, do not cooperate, which also directly affects the observation results. However, when taking a chest film, the shooting time is short (only 1~2 seconds), and the X-ray dose received by sick children and doctors is small, so the printed film can be reviewed by a higher level doctor. Its biggest disadvantage is that it is time-consuming, with only one posture, and it is impossible to turn over the sick child at any time to understand the relationship between the lesion and related tissues; In addition, the chest radiograph needs to be developed, the price is higher than that of the chest radiograph, and it often takes 1~2 days to produce results. Therefore, the two basic methods have their own characteristics, and sometimes the combination will greatly improve the diagnostic rate.