I believe everyone is no stranger to CT. Let's talk about a topic that people love to talk about: Is CT harmful to the body? With the development of science and technology, CT has become a routine physical examination for people to see a doctor every day. Some people mistakenly believe that as long as a CT physical examination is done, any disease can be understood by the physical examination. Doctors are always required to do body CT, and some unscrupulous doctors often let unnecessary patients do CT physical examination. The actual CT physical examination is not omnipotent, and the abuse of CT can even cause cancer. Scientific research has long proved that exposure to X-rays can cause a variety of tumors, including leukemia, thyroid cancer, breast cancer and lung cancer, and may also cause tumors of salivary glands, stomach, colon, bladder, ovary, central nervous system and epidermis. The harm of CT physical examination to the body is to expose the examinee to a large dose of X-ray radiation. Studies by the Radiation Protection Committee (ICRP) abroad have proved that a CT scan of the body will greatly increase the risk of radiation-induced cancer by about 8%. Radiation-induced cancer and hereditary diseases are dose-linear, which means that the more exposure, the greater the possibility of fatal cancer and hereditary diseases. The risk of cancer caused by CT physical examination depends to some extent on the age at the time of exposure; Excessive radiation exposure in childhood is not unrelated to the sharp increase of leukemia and thyroid cancer, which will greatly increase the risk of breast cancer in the growth period and the chance of lung cancer in the later years. Therefore, both medical staff and people should learn some knowledge about radiation protection. We should strictly grasp the indications of CT physical examination, and use non-radiation methods (such as ultrasound) if they can be used, and CT physical examination is not needed if they can be solved by filming. Pay special attention to women of childbearing age, pregnant women and infants, and avoid not using CT physical examination. Take precautions and reduce the harm caused by radiation to human beings. Of course, CT physical examination should not be abused or panicked. Then, how should we treat CT physical examination correctly? First of all, we understand that for the literal meaning, CT is only likely to induce cancer, not necessarily to cause cancer. CT relies on emitting X-rays to go to work, and X-rays are necessary to kill body cells. If X-rays are irradiated for a long time or in a large dose, it may cause cancer of body cells or fetal malformation. Therefore, from this factor, X-ray irradiation may indeed cause cancer! So, is it necessary for us to panic about CT, especially to question or resist the normal CT physical examination? Actually, completeness is unnecessary! Because under normal circumstances, there are not many cases where we need to do CT when we are sick, and the X-rays that our bodies eat will be very few. Such a short time and a small dose of X-rays will not do any harm to our bodies, and our bodies will have the effect of self-repair. Even if a few cells are damaged, there will still be some mechanisms in our bodies, and these cells will be swallowed or removed before they become cancerous, and the cancer will never come to this step. Therefore, we don't need to panic or be afraid of the statement that CT may cause cancer. If we are sick, we really need to do a CT physical examination. We still have to do it, so that we can accurately and quickly diagnose the illness, which is conducive to early and correct treatment and early recovery. And if you are afraid of CT and resist it, then you can't diagnose the disease and treat it scientifically. You can only suffer from yourself. As long as we insist on scientific and rational use of CT physical examination, there is no need to panic! However, this does not mean that we can make a CT scan at will. After all, the X-rays of CT are harmful, and if they are used too much, they will do harm to the body, so they cannot be abused. In short, CT physical examination is definitely harmful to the body, but it is necessary to use CT physical examination scientifically and reasonably, and it will not cause great harm to the body.