8 times of ct radiation in 2 months caused cancer.

8 times of ct radiation in 2 months caused cancer.

8 times of ct radiation in 2 months caused cancer. Cancer-related diseases are all we are very afraid of, and many people worry that frequent ct scans will cause cancer. Next, I will take you to know more about the related contents of 8 times of ct radiation carcinogenesis in 2 months.

Ct radiation causes cancer 8 times in 2 months, 1 usually does not cause cancer. Cancer usually has little to do with radiation and other factors. Generally, the radiation produced by CT examination can gradually disappear in a day or two. Try not to carry out ct examination too frequently in your life, considering that it may bring you side effects. If you suspect that you have cancer, you can go to a regular hospital for a comprehensive examination to determine your condition and maintain a good attitude during treatment.

Frequent CT scans are easy to cause cancer?

CT has radiation, but it doesn't mean that exposure will definitely cause serious harm to the body. Just like carcinogens, it is very lax to talk about toxicity without dosage. Generally speaking, once it is done, the dose accepted by the human body is generally within 10msv, which is safe. However, different kinds of them produce different doses. For example, the radiation dose received by the abdomen is slightly larger than that of the nose, and it is larger than that of the plain scan if enhanced CT is used.

If you receive a large dose, such as 100 or more, it is really unsafe. When the dose reaches a certain level, it will damage people's nervous system, cause various discomforts and increase the risk of cancer. But in general, we don't do this check so often. Even if you want to do it, the doctor will consider the dose accepted by the human body, not that you can do it if you want to.

So, how many times can you do it a year?

Generally speaking, it is safe to do 1-3 times a year, but this is not absolute. It should be judged according to your actual situation. If you examine not one site but multiple sites, the human body will receive more doses at a time than only one site, depending on whether you do plain scan, enhanced scan or contrast scan. As long as the dose received within one year is within the safe range, don't worry too much.

One more thing to say here is that we should not over-deify PET-CT. This does not mean that cancer can be found just by checking this. Different types of cancer have different early definitions, so the examination should be targeted.

For people engaged in radiation work, there are regulations in China that the annual dose should not exceed 50msv. If you need to do it often because of physical reasons, it is recommended to carry out relevant tests regularly, such as blood routine, to check whether radiation has affected your body and intervene in time.

Speaking of which, many people may not be very clear about what CT can detect. Under what circumstances do you need to do it?

It can scan around a certain part of the human body with X-rays and Y-rays, and can see the distribution and quantity of diseased parts, which can diagnose some cancers to some extent. For some nervous system diseases, it is the first choice for examination. In addition, for the neighboring organs with diseases, we can also learn some things through CT, such as abdominal, chest and bone problems, which can be said to be its advantage.

But everything has two sides, and CT has some shortcomings, such as relatively high examination cost, which is not suitable as a routine examination method.

In addition, there are some precautions before and after the inspection, which everyone should understand to avoid affecting the inspection results and bringing unnecessary hidden dangers.

Before the examination, the patient should take the initiative to inform himself whether he has done any examination during this period and whether he has taken any medicine, so that the doctor can know more about his situation. If he feels unwell, he should also inform him in time. Anything with metal material should be removed, and if the patient has a metal heart stent in his body, he should also inform the doctor. During the inspection, if you feel uncomfortable, you should also give timely feedback. After the inspection, don't leave in a hurry, and observe for about half an hour to prevent adverse reactions. It is recommended to drink plenty of water at this time.

There are situations that need to be done, and of course there are also situations that are not suitable for doing. It may not be suitable if:

(1) Thyroid lesions.

(2) Liver and renal insufficiency

(3) Iodine contrast agent allergy

Some people may find it strange that there are no pregnant women among those who are not suitable for CT. Didn't you say that you can't check during pregnancy?

Actually, it doesn't mean that you must not do it during pregnancy. Even if the pelvic cavity is in a high dose, it will generally not exceed the threshold that will cause fetal malformation. Whether it can be done during pregnancy varies from person to person. According to your own situation, if the advantages outweigh the disadvantages, it is ok to do it. Of course, if MRI can be used instead of CT, it is recommended that pregnant mothers choose the latter, because MRI has no radiation and is safer by comparison.

The principle of two ct scans caused by eight CT radiations in two months.

CT uses X-ray beam to scan a certain part of human body. The X-ray passing through this layer is received by the detector, converted into visible light, converted into electrical signal through photoelectric conversion, and finally processed by computer to form an image inspection. Simply put, CT examination is like cutting potato chips, and you can see which one is wrong. By layering the human body with X-rays, layered inspection can be realized and more information can be displayed. However, X-ray is a kind of high-energy particles, which will destroy the cell function and metabolism of human body when penetrating human body.

If the dose is not large, CT will only have a short-term effect, and the human body can repair itself. If the dose is large, it will damage genes, increase the probability of biological effects, and cause carcinogenic, hematopoietic, reproductive, genetic, growth and development, hormone regulation and other effects.

Positive significance of CT in diagnosis and treatment of cancer patients

CT is widely used in cancer, including cancer scanning, auxiliary diagnosis of tumor, cancer grading, and detection of tumor recurrence.

For example, conventional X-ray and chest CT are effective screening methods for lung cancer in healthy people. However, conventional X-ray films are not sensitive to small lesions and hidden lesions, and the detection rate is low. Chest low-dose spiral CT is the best choice for screening lung cancer because of its low dose, high Levine rate and high accuracy.

In CT examination, especially PET-CT has a high accuracy in cancer screening. PET-CT injects radioactive deoxyglucose into the body to make it flow to all parts of the body, and then shoots the rays produced by these glucose through the corresponding examination parts, and judges whether there is cancer through the detected images, with an accuracy rate of 96%.

Do CT often cause cancer?

The radiation dose of CT scanning is related to the number of CT scans. Usually, the radiation dose received by human body in one examination is 0.02mSv for chest X-ray plain film, 2mSv for head CT, 1.5 msv for low-dose chest CT, 4-7mSv for chest CT and 8mSv for abdominal CT. However, the maximum safe radiation cumulative dose of diagnostic scanning in a person's life is 100mSv, which means that the risk of cancer caused by a single CT scan is very small.

However, if multiple CT scans are performed, the radiation dose will be different. Studies have shown that the risk of cancer will increase by 0.05% for every CT examination. This means that long-term exposure to x-rays is easy to cause cancer. For most people, the benefits of CT scanning far outweigh the potential risks. Cancer is generally difficult to occur unless long-term high-dose radiation.

These people are not suitable for CT examination

Although CT examination has the advantages of high definition, multi-organ function analysis and low radiation, not everyone is suitable for CT examination. There are seven groups of people who are not suitable for CT examination, including: people who are allergic to iodine contrast media, people with severe liver and kidney function damage, hyperthyroidism patients, people with renal insufficiency, people who were allergic to contrast media and other drugs in the past, children under 65 years old, and elderly people over 438+0 years old.

In addition, the doctor should be informed before CT examination, such as detailed medical history, various examination results, whether there is any drug allergy, etc. Cooperate with the doctor during the examination and follow the doctor's instructions. If you feel uncomfortable during CT examination, you should inform the doctor in time to avoid accidents.

Although CT examination will produce low-dose radiation, it is beneficial to us in the long run. Because any living thing in the world has certain radiation, as long as the temperature is higher than absolute zero -273. 15℃, it will radiate energy in the form of waves. However, we should also learn to prevent radiation. Take CT examination as an example. If X-ray and CT are not needed, other inspection methods can be used instead to avoid radiation exposure.

8 times of ct radiation in 2 months caused cancer. How much radiation does 3 CT have?

The dose measurement unit of radiation is mSv, and the radiation of CT can be understood through the following examples. The dose of flying for 20 hours is 0. 1mSv, the dose of chest film is about 0.2mSv, the dose of CT scanning is about 2mSv- 10mSv, and the dose of chest film is about 1. 1mSv.

According to the recommendation of the International Radiological Committee in 1990, the recommended dose limit of radiation caused by any work and life of the public is 1mSv/ year. In fact, the radiation dose received by imaging workers (filming or ct workers) far exceeds 1mSv, but it does not exceed 20mSv per year on average in five years and 50mSv per year.

How does CT hurt people?

X-ray is a kind of high-energy particles, which will destroy the cell function and metabolism of human body when penetrating human body. If the dose is not large, it will only have a short-term effect, and the human body can repair itself with relatively little harm.

If the dose of X-ray is large, it will damage genes and produce various harmful biological effects, and with the increase of radiation dose, the probability of biological effects will also increase.

Biological effects include not only carcinogenic effects, but also hematopoietic, reproductive, genetic, growth and development, hormone regulation and other effects. Madame Curie, as we all know, died of leukemia caused by long-term exposure to radioactive substances.

What is the probability of cancer caused by CT scanning?

Assuming that the human body is exposed to radiation, it needs a process: first, radiation causes DNA breakage in some cells, and these damaged cells will be genetically repaired. Most cells that fail to repair will end in apoptosis, and occasionally there will be gene mutation, but the mutated cells will be eliminated by the immune system in most cases. It is really not that easy for normal cells to become immortalized cells after a small probability event.

From animal experiments, it is generally difficult to cause cancer unless long-term high-dose radiation, and the probability of bone marrow suppression is higher.

Madame Curie, who had been dealing with radioactive substances all day, died of aplastic anemia (bone marrow suppression) because of long-term large-scale exposure to radioactive substances, which was equivalent to taking CT all the time.

Risks and benefits

CT is very suitable for finding early lung cancer, judging cerebral hemorrhage, vascular reconstruction and staging of malignant tumors. However, it is absolutely unnecessary to say that CT is used to diagnose gastric ulcer and pelvic CT is used to diagnose hysteromyoma, because every disease has its most suitable examination method, so it is necessary to do corresponding examination or ultrasound examination. If the diagnosis is not clear, further examination is needed.

In CT examination, we should strictly follow the three principles of basic radiation protection of the International Commission on Radiological Protection.

First of all, the principle of legality must ensure that the application of ionizing radiation does less harm than good to people;

Second, the principle of optimization, any irradiation is kept at a reasonable minimum level to avoid unnecessary irradiation;

The third is the principle of limitation, to ensure that the dose accepted by individuals does not exceed the corresponding dose limit, and to minimize the harm caused by radioactive inspection to the subjects.

Taking the screening and early detection of lung cancer as an example, low-dose high-resolution CT can find early asymptomatic lung cancer and win more opportunities for surgical resection. The benefits of early detection brought by CT to the high-risk group of lung cancer outweigh the harm of one irradiation.

There is no need for patients with common pneumonia to do CT reexamination repeatedly in a short time, and chest radiographs can be used instead.

In a word, CT examination can be used safely. One or two inspections will not cause serious harm to the human body, but if there is no harm, it cannot be misused or abused.