Recently, Guangzhou, Shenzhen radiation protection experts at the same time called for children's annual physical examination, chest X-ray a should be called off as soon as possible. From this, has been quite mysterious radioactive examination instantly become the focus of attention. Many readers have called and written to this reporter to ask: X-ray is harmful to the human body? X-rays will cause cancer after a few times? In response to these questions, the reporter interviewed Associate Professor Guo Liang, director of the Department of Imaging Medicine at the First Hospital of SUU.
The staff of the "X-ray storage"
Just into the first hospital imaging building, the reporter found that the staff of the chest here with a "small tube". It turns out that this small tube is called "radiation measurement tube", is specifically used to measure the amount of X-ray ingested by professional staff every day, it will be taken down every once in a while, to measure the X-ray dose ingested by the staff is not excessive. Director Guo told the reporter that the results are usually within the normal range. Professionals like him who have been working for many years are "qualified" for every measurement.
Guo Liang said that in modern medicine, X-rays can be said to be prevalent, showing its importance everywhere. Like CT, nuclear magnetic **** vibration, interventional radiology, these people are not unfamiliar with the radioactive examination, constantly used in clinical medicine, greatly improving the diagnosis of diseases. Their daily work is through the X-ray pair of penetrating "eyes" to check the patient's body of various abnormalities.
Taking a picture is equal to watching an hour of TV
When the reporter asked with doubt whether the frequent acceptance of X-rays in medicine would increase the possibility of cancer, Guo Liang first listed such a set of data. He said, a filming of the body's X-ray dose is equivalent to watching an hour of television ingested; and chest X-ray dose is equivalent to 1.5 times the filming; if you want to talk about the harm is to do a chest X-ray damage is equal to smoking 3 cigarettes.
If receiving medical X-rays is susceptible to cancer, then aren't medical professionals like them who have been working for years and years surrounded by all this equipment and technology the first victims? The values obtained from the "radiometric tubes" they wear every day at work are generally within the normal range. This means that the claim that "a few X-rays can cause cancer" lacks scientific basis and cannot be substantiated.
CT once a week will not affect the health
We all know that X-rays have a certain killing and destroying effect on biological cells, and excessive exposure to X-rays will affect physiological functions, cause chromosomal abnormalities, and lead to the occurrence of cancer. However, a moderate amount of irradiation will not affect the health of the human body. The dose of X-rays used by medical personnel for fluoroscopy and photography is very small and is limited to a safe dose. In particular, an occasional chest X-ray, a gastrointestinal examination, a bone X-ray or an angiogram will not cause adverse reactions. Moreover, the X-ray dose used for filming is not completely absorbed by human beings, most of it is penetrated from the human body, and only a very small part of it is absorbed by the human body, if we want to talk about a specific value, that is, it is really absorbed by the human body is only a few ten-thousandths of the dose used, or even less.
And now, like SUU hospitals and other major hospitals in Suzhou, the use of radiological examination equipment has been replaced by digital radiography (CR) and direct digital imaging (DR), the amount of radiation than the original and reduce a lot of, accounting for only 1/7 of the original.
So, exactly, the normal human body to do a CT once a week is definitely not affect the health of the. Director Guo emphasized that medical X-rays can never affect people's health when they are examined and treated, so the public does not have to have any concerns.
The main reason for the cancellation of chest X-ray
For the cancellation of the chest X-ray project for elementary school students, Guo Liang believes that the chest X-ray using a large dose of radiation is an aspect of the chest X-ray, but I am afraid that the main reason is still because of the chest X-ray is relatively low resolution compared to the film, from the beginning to the end of the diagnosis is only a physician to diagnose, diagnostic accuracy can only be based on the personal level of this physician, resulting in the The error rate is relatively high, and it's not like a radiograph where you can keep data for review.
Who should not do X-ray examination
Guo Liang also pointed out that although the body has discomfort is difficult to determine the cause of the disease, you can do X-ray examination to reassure themselves. But there are two sides to everything, radiological examination is no exception, some people should pay a little attention to do X-ray examination, for example, pregnant women within 3 months of pregnancy should not do X-ray examination, because this stage of the fetus is not yet formed, pregnant women, if too much to receive X-rays, it is easy to cause fetal mental retardation or microcephaly, resulting in the incidence of cancer after birth increased.
In fact, X-rays are ubiquitous in our daily lives. There are X-rays in TVs, computers, cell phones, microwave ovens, and even the sunlight and moon rays that nature has given to mankind. And some objects in daily life X-ray hazards can not be ignored, such as not letting small children too close to home is working in the microwave oven; selection of building materials should be carefully selected, such as the larger radiation granite should be used with caution; usually do not watch TV or use the computer for long periods of time, if it is necessary for the work, as far as possible to do the work of one or two hours to let themselves rest for ten minutes.