Anyone who has had an MRI knows that under normal circumstances, doctors do not accompany patients into the examination room, but sometimes family members are asked to enter with the patient.
Some people who don’t understand the truth will speculate that whether there is radiation in the MRI examination, the doctor will stay outside during the patient’s examination and let the patient go in by himself.
In fact, this idea is wrong, and it is also a misunderstanding. This resonance does not have nuclear radiation , but has electromagnetic radiation , but general electromagnetic radiation will not cause damage to the body. Why do doctors still not recommend everyone to have an MRI?
Why is it not recommended that everyone do MRI? Most people still don't know. Listen to the doctor's answer.
The examination process is cumbersome
MRI is a very cumbersome examination item. Many patients need to test multiple organs of the body, and each part takes about 20 to 30 minutes.
If it is a whole-body examination, it may take several hours to undergo an MRI. During the human body scan, only one part can be detected at a time, so the examination requires a lot of time and energy. Unless there are special circumstances, there is no need to arrange for the patient to undergo this examination.
is more expensive.
The cost of MRI is relatively higher than that of other instruments, because it requires specific charges based on the examination site. If multiple sites are examined, the cost will be several times higher.
The cost of MRI itself is high, and examining multiple parts of the body at the same time will undoubtedly increase the patient's financial burden. Therefore, in most cases, the hospital will not recommend patients to undergo MRI if they do not have extreme discomfort in certain parts of the body.
Some organs are not suitable for
Nuclear magnetic resonance detection is to place the person in a strong magnetic field for detection. It mainly uses the jitter characteristics of hydrogen atoms to complete the resonance, and then receives the detection signal and generates an image.
There are some organs in our human body that do not contain water, so MRI cannot be performed, such as the heart and intestines. These parts are generally subjected to CT examination or cardiac color ultrasound examination. Even for some gastrointestinal discomfort, gastroenteroscopy is usually chosen, and MRI is rarely chosen.
What types of diseases can MRI target?
Head examination
Through this examination, you can see whether the patient has cerebral hemorrhage , brain tumor, cerebral infarction , or cerebral metabolic disease. It can correctly locate the location of the lesion and characterize the lesion.
Chest examination
The lungs, mediastinum , chest wall, especially lymph node enlargement , mediastinal tumors, etc. can be effectively observed through the examination.
Abdominal examination
MRI re-examination, liver adenocarcinoma, liver cyst, liver cancer , liver hemangioma and other diseases, not only can make a timely diagnosis, but also can identify the disease through different sequences of imaging.
Joint diseases
For example, bone and joint trauma, ligament and tendon injuries,bone tumors, etc., the cumulative range of these lesions will be displayed more accurately, and CT will have a relatively high display result if it cannot be displayed, so doctors will recommend relevant examinations based on the patient's different conditions.
What should I pay attention to when doing MRI examination?
Do not move arbitrarily
During the examination, the instrument will produce a certain amount of noise, and some patients will feel obvious discomfort. However, do not move arbitrarily during the examination. You must insist on completing the entire examination to avoid affecting the accuracy of subsequent examination results.
Remove metal objects
Metal objects are not allowed on the body for MRI examination, so they must be removed in advance, and underwear with metal objects cannot be worn. You must explain to the technician whether you have an operating room and whether there is any metal or magnetic material implanted in the body.
Do not wear makeup
For female patients, if you need an MRI examination, please do not wear makeup before the examination. Cosmetics contain certain metal substances, which can easily cause infection to the magnetic field and even interfere with the examination results, such as sunscreen, nail polish, etc., which will affect the accuracy of the MRI examination.
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