With the improvement of people's health awareness, more and more people have begun to pay attention to physical examination. There will also be some radiological examinations such as CT and B-ultrasound in the routine physical examination items, and everyone has a different understanding of these examinations.

Some people think that the more expensive the data, the more accurate it is, and some people think that these radiological examinations have a large amount of radiation and are not conducive to physical health, so is the radiation examination really harmful to the body?

1. What is the difference between CT, B-ultrasound and MRI?

These are very common tests, but many people don't know what the difference is, so what is the difference between the three?

1. CT examination

A CT scan is like dividing bread into slices, using X-rays to layer through the inside of the human body, and then presenting the data image to a computer.The organizational information shown is relatively large。

2.B-ultrasound examination

Ultrasound is an ultrasound that passes through the body and generates reflected waves to image, and the machine can be moved to see the condition of the lesion.

3. Nuclear magnetic resonance

MRI is to use the magnetic field of the machine to keep the magnetic field of water molecules in the human body consistent, and then when the magnetic field of the machine disappears, the magnetic force of water molecules becomes a random arrangement.

2. Is there a risk of carcinogenesis if a CT is done?

Some people are frightened when they hear that CT has a lot of radiation and may cause cancer, and the doctor prescribes a checklist, but they are hesitant to do it, so is there really a risk of cancer caused by a CT scan?

CT examination can be performed for different parts of the body, and the radiation dose of CT examination is different for different parts, the radiation dose of a head CT examination is generally 10mSV, and the radiation dose of a CT examination of the abdomen or pelvis reaches 0mSV.

Generally usThe acceptable amount of radiation per year should be 4-0 mSVEven if it is required for the profession, it is best not to exceed 50 mSV in a year.

The amount of radiation in CT examination is unavoidable, and the frequency of CT examination three times a year is relatively safe, and it is not recommended to exceed three times, after all, CT radiation will bring harm to the body.

According to a study in The Lancet, long-term or repeated low-dose radiation increases the risk of death from acute leukemia.

However, Hao Surong, director of the radiology department of Nanjing Hospital of Integrated Traditional Chinese and Western Medicine, pointed out that such a conclusion is related to the occupational exposure of the survey subjects, and that few people in ordinary life develop cancer due to receiving low-dose radiation.A normal CT scan does not cause cancer.

Third, do a good job of these 6 points to effectively reduce radiation hazards

If you want to avoid radiation damage caused by CT examination, you must pay attention to some precautions, and do the following points to effectively reduce radiation hazards.

1. Understand the contraindications to CT

Pregnant women, patients with severe thyroid disease, people who are highly sensitive to X-rays, and patients with aplastic anemia are not suitable for CT scanning.

2. Avoid unnecessary radiation damage

When the doctor asks the doctor, it is important to tell the doctor which part of the body is uncomfortable, so that a certain part of the body can be accurately examined, avoid unnecessary radiation to other parts of the body, and be careful not to perform multiple CT scans in a short period of time.

3. Be prepared before the examination

After communicating with the doctor in advance, proper preparation before CT examination is beneficial to improve the examination effect.

4. Remove metal objects during inspection

Metal jewelry items may interfere with the results of the examination, so remove metal objects as much as possible during CT scans.

5. Try to cooperate with the doctor to shorten the CT examination time

In the process of CT examination, it is necessary to cooperate with some normal prompts of the doctor as much as possible to shorten the time of CT examination and reduce the amount of radiation.

6. After the CT examination, drink more tea and eat more anti-radiation food

After the CT examination, try to drink more tea, eat more cabbage, tofu, milk, lean meat, carrots, red dates, kelp, black fungus and other nutritious and radiation-resistant foods.

Many adults have had the energy to do CT examinations, although there is a certain amount of radiation in CT examinations, but generally no more than three examinations a year, the impact on the body is not great, but when performing CT examinations, try to cooperate with doctors to ensure that the radiation is effectively reduced.

參考資料:

[10] The difference between CT, MRI, and B-ultrasound is too well explained. China Medical Doctor Liaison Station. 0-0-0

[17] How many times a year does a CT scan cause cancer? The results of scientific data analysis are surprising. Huaxia Diagnostic Imaging Center. 0-0-0

[27] [Health knowledge] How much CT radiation? Can it cause cancer? The truth turned out to be the subscription number of the Third People's Hospital of Huizhou City ........ 0-0-0

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