Excuse me, what is the spread in physical examination? What disease is it used to check?

Brother ~ ~ chest X-ray is good, mainly depends on whether there is abnormality in the heart, nasal septum and lungs, and the most important thing is to find out whether there is shadow in the lungs ~ ~ chest X-ray, such as tuberculosis, infection and inflammation, is a common X-ray examination method. It uses the characteristics of X-ray's penetrability, fluorescence and photographic effect to make the human body form an image on the screen. Because the density and thickness of human tissues are different, when X-rays penetrate different tissues of human body, the X-rays are absorbed to different degrees, so the amount of X-rays reaching the screen is also different, forming images with different black-and-white contrast. Hey, you don't know ~ ~ this is very professional, hehe.