Let everyone know if there is any radiation damage in the radiology examination

I believe that some friends will always have some questions when doing radiology examinations, such as "worry about whether there will be radiation from chest X-ray, CT or magnetic resonance examination, will it cause great harm to the body". While the editor is pleased with the increase in public awareness of radiation protection, it is also necessary to spread the knowledge of radiological examinations to everyone.Meilun

Radiology examination

The daily X-ray and CT examinations are performed with X-ray imaging. When X-rays penetrate the human body, they interact with the substances in the body to produce "secondary particles" to ionize the substances. This phenomenon is called ionizing radiation. Excessive X-ray irradiation can cause the inhibition, damage and even necrosis of biological cells (biological effects). This is the radiation damage that some friends usually fear, but as long as you master its characteristics and apply it reasonably, X-rays are not so terrible. We are completely We can use our strengths and avoid our weaknesses to make it serve humanity.Meilun

The principle of magnetic resonance is an artificial magnetic field in which the human body lies, and then undergoes a series of radio frequency pulse (RF) excitation, acquisition, and conversion of signals, and then images are obtained. Therefore, during the nuclear magnetic inspection, the human body is excited by radio frequency. This radio frequency is radiated, but this kind of radiation is equivalent to that of a mobile phone. Therefore, nuclear magnetism has radiation, but this kind of radiation is a kind of non-ionizing radiation. So far, it has not been found that the radiation of nuclear magnetism is harmful to the human body.

In addition, when it comes to ionizing radiation, the first thing you need to know is that all living things on the earth, including humans, are exposed to natural background radiation. Natural background radiation includes cosmic rays and rays emitted by natural radionuclides in nature, which exist forever. The average annual effective dose from natural background radiation is about 3mSv. An X-ray examination only produces 0.01-0.02mSV radiation dose, which is only equivalent to staying outdoors in a natural environment for 5-10 days. The radiation dose of a routine chest CT examination is about 2mSv.Meilun

Radiology examination

In particular, the current equipment and inspection technology used are more advanced. For example, the low-dose mode of chest CT examination can reduce the radiation dose to about 0.2mSv, which greatly reduces the radiation dose. In addition, radiology technicians will also protect the radiation-sensitive parts of the patient's inspection site. This double insurance makes the current X-ray and CT inspections safer.