What items can X-rays carry?

Within a few months after Roentgen discovered X-rays in the medical field, it was applied to medical imaging. 1896 In February, Scottish doctor John McIntyre established the world's first radiology department in Glasgow Royal Hospital.

Radiology is a special field of medicine, which uses radiography and other technologies to produce diagnostic images, which may be the application of X-ray technology.

The vastest place. X-ray is mainly used to detect bone lesions, but it is also very useful to detect soft tissue lesions. Common examples are chest x-ray, which is used to diagnose lung diseases, such as pneumonia, lung cancer or emphysema; Abdominal x-rays are used to detect intestinal infarction, free air (due to visceral perforation) and free fluid. In some cases, the use of X-ray diagnosis is still controversial, such as stones (which have little blocking effect on X-ray) or kidney calculi (which is generally visible, but not always visible).

With the help of a computer, people can combine X-ray images from different angles into three-dimensional images. Computed tomography (CT scan) commonly used in medicine is based on this principle.

(1) X-ray diagnosis

The application of X-ray in medical diagnosis is mainly based on its penetrability, differential absorption, photosensitivity and fluorescence. Because X-rays will be absorbed in different degrees when passing through the human body, for example, the amount of X-rays absorbed by bones is more than that absorbed by muscles, so the amount of X-rays after passing through the human body is different. It carries the information of the density distribution of various parts of the human body, and the intensity of fluorescence or light sensitivity caused on the fluorescent screen or photographic film is very different, so shadows with different densities will be displayed on the fluorescent screen or photographic film (after development and fixation). According to the contrast between light and dark, combined with clinical manifestations, laboratory examination results and pathological diagnosis, we can judge whether a certain part of the human body is normal or not. Therefore, X-ray diagnosis technology has become the earliest non-evisceration inspection technology in the world.

(2) X-ray therapy

The application of X-ray in treatment mainly depends on its biological effect. When X-rays with different energies are used to irradiate the tissue of human lesions, the irradiated tissue can be destroyed or inhibited, thus achieving the purpose of treating some diseases, especially tumors.