CT can see internal organs and tumors through the human body, so what side effects will CT have?

CT stands for Computerized X-ray Tomography (X-ray is also used in interventional radiology). The gonads, lens, breast and thyroid in human body are particularly sensitive to radiation. If exposed to high-dose radiation for a long time, it may lead to cataract, sterilization, growth retardation, and even induce malignant tumor or leukemia. The influence of X-ray radiation on the fetus is more likely to cause embryonic disability, fetal malformation and brain dysplasia, and increase the probability of children suffering from cancer. But usually in the early stage of pregnancy, exposure to X-rays is more likely to cause major injuries, and the closer to the expected date of delivery, the smaller the impact.

When doing the examination, the dose used for X-ray fluoroscopy and photography is very small, which is within the safe range. The X-ray dose ingested by human body at one time is equivalent to the amount ingested by watching 1 hour TV. One dose of chest X-ray is equivalent to 0.5 times of 65438+X-ray photography; If you want to say harm, it is that a chest X-ray is equivalent to smoking three cigarettes.

Generally, the location of CT room and the structure of walls, doors and windows have certain standards and have certain protective effects. But the protection is for doctors, and patients are still in direct contact with X-rays. There are some images, but they appear occasionally, and the problem is not big. There is no need to enhance their resistance. Radiological diagnosis, like radiotherapy, only weighs the relationship between radiation hazard and accurate diagnosis.

Strictly speaking, what can be filmed is not fluoroscopy, and what X-ray can solve is not CT.

But after all, there are several orders of magnitude differences between the dose of a CT and the national limit. If you really can't shoot clearly once and need an exact diagnosis, you still have to do it again.

From the point of view of radiation hazard, it is obviously harmful, and this kind of harm is very small, which is conducive to diagnosis.

Of course, the exception is to open your own examination without authorization.

In addition, the pressure of two consecutive CT scans should not be large, and the dose of one CT scan is related to mA, scanning layers and scanning width. Maybe you can't even sweep twice as much as some people do once.

The damage of radioactivity to the body is random in a certain dose. Like 1 10,000 lottery tickets. There is a difference between buying two tickets and buying one ticket, but there is not much difference.

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Look what you said about killing cells. The harm of CT dose to people is not directly killing cells, but indirectly causing certain ionization.

It is really harmful to a person, who is backward, and ionization destroys the chemical bonds of cells; There is a back that destroys chromosomes; Back, this DNA is very important; Damaged DNA has not been repaired; It also bypasses various repairs and the continuous expansion of the immune system. . . People who can recite to this extent will choke to death if they drink water early, and the probability of choking to death if they drink water is relatively greater ~