Originally there was no cancer, went to a CT found cancer, complained that CT gave the child a picture of cancer, and then hit the hand, I don't know whether it is ignorance, or barbarism, or shortcomings what human beings should have.
Does a CT show cancer?
A normal CT examination will certainly not lead to cancer; even if you take 10,000 steps back, even if there is radiation in CT, it is impossible to immediately radiate cancer after doing CT.
What is CT?
CT is the most common kind of examination in modern hospitals, simply put, X-ray is a plane to see whether there is a problem with a certain part of a person's body; then CT is a three-dimensional look at whether there is a problem with a certain part of the human body.
To put it bluntly, X-ray can only simply look at the size of a watermelon, whether there is anything else running into the watermelon; CT is to cut this watermelon into slices, how many melon seeds are on each slice, and what color each piece of watermelon is can be seen clearly.
X-ray relatively has certain limitations, such as chest X-ray, that is, chest x-ray, can only look at a rough, there is no longer something larger on the lungs; but smaller, or obscured parts of the long thing, chest x-ray is not visible. CT can see the lungs piece by piece clearly, and it is not easy to miss the diagnosis.
What parts is CT suitable for and what diseases are diagnosed?
1. Chest: lung trauma, lung infection, lung tumor is also the diagnosis of lung cancer.
2. Brain: traumatic brain injury, cerebral infarction, cerebral hemorrhage, brain cancer, cerebrovascular malformations.
3. Abdominal and pelvic cavity: liver, gallbladder, spleen, pancreas, kidneys, adrenal glands and other organs can be seen more clearly; CT is also the most common diagnostic means for cancer in pelvic areas such as the ovaries, cervix, uterus, bladder, seminal vesicles, prostate, rectum and other parts.
Recently, a child in Wuhan had dyspepsia, no abnormality was seen through gastroscopy, and then the doctor suggested abdominal CT, and the results found that the pelvic tumor was found, and the result was that the parents believed that the doctor let the child do CT, and CT led to the child's cancer. At present, the matter is still under further investigation.
(Those who don't believe in modern instruments can actually go to some places that don't use the instrument to see a doctor, rather than spray on the Internet.) Everyone has their own right to choose, and I believe that there will not be a doctor who will go to your house and take you to the hospital for any examination. ）
4, bone and joints: the same reason, X-ray can only see one surface, CT can see the bones and joints at all levels.
5. Heart and large blood vessels: pericardial tumor, pericardial effusion, aortic dissection, pulmonary embolism, cardiovascular, etc.
Is CT harmful to the human body? Does it cause cancer?
CT is the stereoscopic version of X-ray, X-ray radiation is about 0.2 millisieverts, chest X-ray radiation is about 1.1 millisieverts;
Radiation dose of CT: The radiation dose of a chest CT is about 2 to 15 mSV, and the radiation dose varies from part to part.
Theoretical hazards of X-ray radiation to the human body:
After ionizing radiation, it is theoretically possible to induce genetic changes in the body. Rays cause parts of the cell's DNA to break, damaged cells undergo genetic repair, repair processes, and rarely genetic mutations may occur, which may increase tumor incidence.
But it's not that the human body becomes cancerous when it's exposed to radiation, because we may be exposed to natural radiation every day, but the amount of radiation is very small. The human body has a certain tolerance to radiation, and within the range of human tolerance, the human body does not develop cancer.
For example, the radiation dose for 20 hours on an airplane is 0.1 mSv. According to the World Nuclear Association, the average person exposed to the air receives about 1-2 msv of background radiation from nature every year, and up to 3msv in North America.
Only when the amount of radiation exceeds the body's tolerance level will the risk of cancer increase. For example, long-term ionizing radiation can lead to an increase in the prevalence of malignant tumors by about 8%. But this refers to long-term radiation, and in our usual medical examinations, especially for some diseases that must rely on CT to diagnose diseases, then ct examination once or twice a year will not increase the risk of cancer.
Why not replace CT with MRI?
Some people have said, is NMR not without radiation risk? Why not use an MRI? Because there are some parts of the human body that cannot be diagnosed by MRI.
CT mainly uses the density of tissues to distinguish lesions and normal tissues, while magnetic resonance uses the signal generated by proton resonance in tissues to examine, especially suitable for tissues with high water content, especially suitable for blood vessels, neuromuscular tissues, etc., so different tests are selected according to different parts.
No need to panic
Grasp the indications, do not do CT, can be replaced by other tests with other tests.
However, for diseases that must be diagnosed by CT, if they cannot be diagnosed in time and accurately, treatment will be delayed and treatment will be delayed. Therefore, it is still necessary to do it for diseases that need to be diagnosed or ruled out by CT testing.
For patients with indications, doing a CT will not lead to an increased risk of cancer, let alone just after doing CT because of CT radiation cancer!