Do a brain CT harm?

summary

There will be many brain diseases, such as brain trauma, and patients will have some discomfort symptoms, such as headache and dizziness, accompanied by nausea and vomiting. At this time, in order to know the specific situation of brain diseases, patients need to go to the hospital for scientific examination. CT is a commonly used examination measure, So is this kind of test harmful to the brain? Let's share my experience with you.

Do a brain CT harm?

CT is the abbreviation of computer X-ray tomography, nuclear magnetic resonance, interventional radiology, etc. Gonad, lens, mammary gland and thyroid gland in human body are very sensitive to radiation. If they are exposed to long-term and high-dose radiation, they may cause cataract, sterilization, growth retardation, and even induce malignant tumor or leukemia.

When doing an examination, the dose used for X-ray fluoroscopy and photography is very small, and both are within the safe range. The X-ray dose absorbed by a person taking a film is equivalent to the amount absorbed by watching TV for one hour; The dose of chest X-ray is 1.5 times of that of film; If you want to talk about the harm, that is to do a chest X-ray damage is equal to smoking three cigarettes. General CT room location, the construction of walls, doors and windows have a certain standard, with a certain protective function. If it's all standard, there should be no problem.

Many people do brain CT will worry about its harm, but whenever the examination of some diseases, do this examination is inevitable. In people's consciousness, do brain CT will get some sequelae, such as leukemia or brain cancer and so on. When doing this kind of examination, radiation is inevitable, but serious diseases are exaggerated. We can learn some knowledge about CT.

matters needing attention

For radiation, you need to understand some basic concepts first. In the living space, radiation is always there, which is called "background" in professional terms. It comes from radioactive materials in life (such as radioactive gas in the home) and cosmic rays in outer space. The commonly used dose unit of radiation is mSv, and the "background" is about 3mSv per year (different places). The radiation dose of chest X-ray is very small, and the radiation dose of brain CT in CT examination is relatively small. When the two are added up, the level of 2.1msv is equivalent to the background radiation level of more than half a year. The probability of cancer occurrence is "low", that is to say, the lifetime cancer risk is between one thousandth and one thousandth.