How much harm does ct do to a person
How much harm does ct do to a person, I believe that many people are no strangers to the ct examination, we all feel that the ct is a kind of examination instrument that has serious radiation, which has a great impact on our body, and the following share how much harm does ct do to a person.
What is CT
CT examination has a sensitive, accurate, specific and localization of precise characteristics, can be a clear understanding of the whole body of the overall situation, to achieve the early discovery of foci and diagnosis of the role of the disease.
The CT scan is a three-dimensional X-ray examination, which is like a big watermelon, we can only see the shape of the watermelon, but can not see the watermelon ripe, there is no seed, is red or yellow melon flesh, and CT scan can not only see all of this, but also layer by layer can be seen. CT scan has an important role in the diagnosis of many diseases.
Although CT is more accurate than X-rays, doctors do not prescribe this test freely, except in certain situations where it is needed.
What are some of the conditions that require a CT scan?
A CT scan is not only effective in diagnosing problems of the head, including traumatic brain injury, brain infarction, brain tumors, and congenital malformations. In addition, CT also has some diagnostic value for heart problems, such as pericardial tumors, pericardial effusion, and other heart diseases.
In addition to the heart and brain, CT for substantial organs such as liver, gallbladder, spleen, pancreas, kidneys, adrenal glands and other organs show is also relatively clear, for tumors, infections and traumas, can clearly show the exact location of the anatomical degree of lesions, the lesion staging, etc. has a high value. There is also the fact that CT can also be used as one of the common methods for the diagnosis of tumor diseases such as ovarian, cervical and uterine, bladder, seminal vesicles, prostate and rectal tumors.
Overall, CT has a wide range of uses and can be used to diagnose diseases in many parts of the body, and the results are relatively accurate. Therefore, when there is a need to do a CT test, we do not need to resist. However, CT examination is not suitable for everyone, the following groups of people, in the choice of CT examination, must be careful, so as not to cause adverse effects on the body.
4 categories of people, cautious CT
The first thing to know is that "cautious" is not the same as can not be done, it is to be evaluated by the doctor, and then determine whether to carry out the CT examination.
1, infants and young children under 1 year old and elderly people over 60 years old, this group of people's body resistance is relatively poor, the radiation is more likely to cause the impact;
2, heart disease patients also have a certain risk of safety, so if there is a history of this disease, should be explained in advance to the doctor;
3, allergy, such as asthma, eczema, and other diseases, should not carry out the CT examination;
4. Patients with renal insufficiency should also not undergo CT examination because the iodine injected before the CT examination is not easily excreted by the body, and will produce toxicity when accumulated to a certain extent.
CT scanning also has certain contraindications, so we should not be reluctant to carry out, so as not to achieve the purpose of the examination not to say, but also hurt the body.
How harmful is CT radiation? Does it really cause cancer?
CT scanning, there is indeed a certain amount of radiation, but radiation in our daily lives can be said to be everywhere, such as from the earth's own rays, house decoration materials within the radionuclides, so we do not "talk about radiation color change".
Generally speaking, the radiation dose of the medical examination is very low, for example: a chest X-ray examination, the examinee receives only 0.01mSv of radiation, cranial CT scanning 2-2.8mSv, chest CT scanning 5.7-8.0mSv, abdominal and pelvic CT scanning 10.0-14.4mSv, the radiation dose of the conventional nuclear medicine body imaging Only 4.2-5.9mSv, and these radiation doses are much lower than the 100mSv deterministic radiation dose.
Therefore, as long as the examination is reasonable, there is no need to worry too much about the radiation problem caused by CT examination. However, it is important to note that prolonged exposure to ionizing radiation can increase the prevalence of malignant tumors (about 8%).
Therefore, we can conclude that although CT scanning is radioactive, the benefits outweigh the drawbacks if it is used appropriately!
To summarize, in the CT examination, to inform the doctor of their own medical history, and then by the doctor to determine whether it is necessary and appropriate to carry out the CT examination, do not resist the examination because of CT radiation, because CT examination as long as the rational use, can help clinicians to develop timely and correct treatment plan, so that the patient's 'benefit to maximize.
How much harm does ct do to people2
What is CT?
The reason why many people have misunderstandings about ct is that they must have panicked after seeing those rays. In fact, don't worry, ct has the advantages of sensitive, accurate and accurate positioning, many other tests can not be done, only ct can do.
To put it plainly, we usually do the X-ray equivalent of the person squashed to observe, nuclear magnetic **** vibration is to shake the person and then go to observe. ct is much more powerful, it is directly to the person to carry out the "slicing", and then a piece of it to observe.
This is an analogy, and you know how accurate the ct is. There are two types of ct, the plain scan and the enhanced scan.
Generally the first time to see the doctor, or simply do not know the condition of the disease, is to do the ordinary scanning, a few seconds on the end of the matter. If you see an obvious lesion at this time, or can make a clear diagnosis, then there is no need for the next step.
But if the ordinary scanning can not make a clear diagnosis, or see is not very clear, then you need to do the enhancement ct, this time do not think that the doctor is cheating you money.
Who needs it and who doesn't recommend it?
In our neurosurgery, there are a lot of problems that require adjunctive ct, such as craniocerebral trauma, cerebral infarction, and brain tumors.
In addition to the brain, cardiac problems and substantial organs such as the liver, gallbladder and kidneys are also clearer with ct.
Although ct is very versatile, it is not recommended for the following groups of people for various reasons.
People with heart disease; infants and children under 1 year of age and elderly people over 60; people with diseases such as asthma and eczema; allergies; and people with renal insufficiency.
Is CT radioactive? Does it cause cancer?
The most significant source of harm in ct is the ionizing radiation produced by X-rays, as this radiation destroys our macromolecular structure and damages cells.
See this is not starting to worry? In fact, there is no need to be nervous! Regardless of anything, put aside the dose to talk about toxicity, are rogues. Just like drinking water, you drink more water than the dose is also water poisoning ah.
In fact, in our daily lives, there are many cases of radiation, as long as it does not exceed the national radiation protection standards in the specified value. What's more, the amount of radiation in the medical examination is very low, for example, the head ct scanning only 2-2.8mSv, which is far below the standard.
So can ct cause cancer? The possibility is there! But there is a prerequisite, which is exposure to prolonged, high-dose irradiation.
So don't panic when you hear about ct. Use your brain to think about it and know that if it is so dangerous to do ct, ct can still be popularized in major hospitals? I'm afraid it would have been smashed by the patients!
How much damage does ct do to a person3
What is a ct test?
ct examination is a kind of electronic computed tomography, it is the use of precise and sensitive detector to around a part of the body to do direct cross-section scanning, in the process of each scanning will let the detector directly through the human body to receive the information issued by the x-ray, and then by the converter will be the analog of these analog into numerical value, and then input into the computer in the high-speed calculation, which will result in the x-ray absorption of the information. The high speed calculations result in x-ray absorption values, and the monitor displays the different data in different levels, so that the anatomy of the body can be clearly displayed on the monitor.
In most cases, the human body has a certain degree of tolerance to radiation damage, which is the ability of human beings in the long-term evolutionary process, but this tolerance has a certain limit, beyond this limit will appear certain symptoms or pathological changes, light dizziness, fatigue, nausea, vomiting, and lead to a decline in blood cells, heart and other important organs damage, brain function decline or even epileptic coma. When the radiation is large enough, it can even lead to a short period of time when the human body fails and dies.
Radiation Warning Signs
What is the harm of a ct test
ct is a kind of invisible to the human eye and can't see and see not to feel the rays, which have a very strong penetration can penetrate the body as well as the general objects, and even some of the metal products can also be penetrated. It can penetrate the body and general objects, even some metal products can be penetrated. Frequent exposure to this radiation within a short period of time can cause a decrease in white blood cells, resulting in fatigue, dizziness, vomiting, and other symptoms. In particular, pregnant women, newborns, and patients with weak bodies are prone to cancerous changes in their organs after exposure.
When ct sends out rays that penetrate the human body, it can cause mild harm to the human body, causing ionization and excitation of the body's biological macromolecules and small molecules, and thus producing some harmful substances. If you don't protect yourself from the radiation, it can cause direct damage to your body.
If the examiner is harmed, it is easy to induce cancer, hereditary diseases, and mental decline. In the clinic, there are patients in the ct routine examination, appeared more than diarrhea and serious dizziness phenomenon, the cell appeared to plummet, less than half of the normal situation. This shows that ct still has a certain harm to the human body, so you need to do a good job of protection when doing ct, especially under the guidance of the doctor.
Many people have great concerns about the number of CTs, and believe that there is a risk of cancer from doing multiple CTs in a short period of time. I don't have strong data to refute this point, but there is nothing to prove that there is a relationship between CTs of the chest and lung cancer or tumors of other organs. After all, compared with smoking and other cancer-causing factors, the amount of time and number of times that a normal person is exposed to a CT is much smaller and there is currently There is no evidence that having a CT causes cancer.
Lung cancer diagram in details illustration
For normal people, frequent chest CT is redundant and unnecessary, the number of medical checkups can be limited to once a year, and in most cases for lung cancer lung disease screening once a year is sufficient. In most cases, for lung cancer lung disease screening once a year is enough, if the CT does not find any lesions, the possibility of advanced lung cancer in the following year is very small, but if the lung has lesions, in the assessment of the effectiveness of the treatment and lesion changes, the CT should be done when it should be done, or even twice a week is also needed, especially for patients with severe lung disease such as severe pneumonia.
A friend just did a unit physical examination last week, but after doing so, he was a little worried: "The doctor nonetheless let everyone do a CT, but then I heard that CT radiation can cause cancer ...... did this CT, will not be very harmful to the body?" In fact, many friends in the CT, there will be such a worry, CT has radiation, I heard that radiation causes cancer, radiation are avoided.
In fact, CT does produce some radiation on the human body, but the specific still depends on the dose.
CT, not as dangerous as you think
Although the body receives radiation from CT, the amount of radiation is actually quite small. For example, a low-dose CT of the chest is a common one, and the body receives about 1-2mSv of radiation for each one, and 2mSv for a CT of the head. The size of the radiation is related to the part of the body that is examined, and there is a positive correlation with the dose, and the higher the dose, the higher the radiation, and the greater the damage caused to the body. However, if a CT scan is done only once in a while, the radiation received by the body is actually very little, and the effect on health is minimal and does not cause significant effects.
Normal medical checkups, the CT should still be done, at this time
The body receives a very small dose of radiation, and it is only when the amount of radiation received is higher than 100mSv per year that the chances of getting cancer increase. That's the equivalent of about 50 chest CTs per year before your health is at risk.
This can be seen, occasionally do a CT, and will not affect the body, do not worry, but sometimes go to the hospital to check the body, obviously have done a CT, the doctor also asked to do the enhancement of CT, this is the reason why it? The first thing you need to do is to get your hands on a new pair of shoes or boots.
What is the need for a CT scan?
Suspected lesions in the chest: When there is discomfort in the chest and suspicion of tumors, inflammation, bronchial dilatation, fractures, and various other lesions, a CT examination is needed, and the next step is to make a judgment based on the examination report. Chest CT is also a common test in daily life, it does not produce a lot of radiation on the body.
Cranial diseases: CT is the preferred diagnostic method for critical conditions such as cerebral hemorrhage and acute cerebral infarction, and it is a very fast process that can lead to timely conclusions about the condition and prepare for treatment. In addition, traumatic brain injury, brain tumors or brain developmental abnormalities and other diseases related to the skull, also need to do CT examination.
Bone and joint problems: CT scanning of the bone and joint can be used to prevent and treat bone and joint diseases by determining whether the bone and joint have lesions, tumors, or inflammation based on the three-dimensional imaging of the diseased area.
Heart disease: heart disease in addition to the need for electrocardiography, CT examination is also unavoidable, through the CT examination of the imaging results, you can determine whether the arteries are diseased, such as the presence of tumors, deformities, occlusion and other issues.
Abdominal diseases: For the diagnosis of biliary, splenic, reproductive and urinary diseases, it is also necessary to do a CT examination, by judging whether there is a lesion on the examination report and the situation of the lesion, the diagnosis of the corresponding tissues and organs.
In short, CT examination is a very important clinical diagnostic means, for the diagnosis of a variety of diseases is of great significance.
Warm reminder, although the ct examination is harmful, but its utility is very wide, especially for the brain, cardiovascular, some organs of the body have a good diagnostic effect, if the doctor recommended to do ct examination, it means that the patients themselves need to do this examination, can not be afraid of ct on the body and resistance to harm, which not only is not conducive to the doctor to do the judgment, but also prone to let the body of the disease can not get accurate treatment. The actual fact is that the actual ct can be used for a lot of purposes, but it can be used for a lot of other purposes.