Clinicians, in order to clarify the diagnosis, often need patients to the radiology department to do a variety of tests, such as fluoroscopy, film, barium meal of the digestive tract and special imaging. As a result, patients often meet with radiologists to ask this or that question, the most common question is: these tests on my health impact? To answer this question is not a simple sentence can be said to understand the specific circumstances to be treated specifically
First of all, we must start from the basic principles of x-ray. x-ray is the German physicist R?ntgen-Wilhelm Konrad in November 8, 1895, found. At that time, because people did not understand this kind of ray, it gave it the name of an unknown number "x", and later people called it "x-ray". x-ray has certain hazards to human health, the greater the amount of x-ray irradiation, the greater the damage to the human body. x-ray irradiation The amount of x-ray exposure can be accumulated in the body, and its main harm is to the white blood cells in the blood components of the human body with a certain degree of lethality, so that the number of white blood cells in the blood of the human body is reduced, which in turn leads to a decline in the body's immune function, so that germs are easy to invade the organism and diseases occur. According to the principles of x-ray theory, the patient in x-ray examination, the amount of safe exposure should be within 100 roentgens, according to this amount of exposure and then develop a permissible number of times and time of exposure. For example, the total accumulation of chest fluoroscopy within a few days should not exceed 12 minutes, and gastrointestinal examination should not exceed 10 minutes. As for radiography, the amount of irradiation varies according to different parts of the body, so the permissible number of irradiation is also different. The health impact of 2 to 3 examinations in a year is negligible. And with the continuous development of medical imaging, the current film and the dark box folder are used "green screen" and "green film", so that the x-ray exposure than the original dose is also reduced by 1