"doctor, i'm so dizzy, why don't you give me an mri, because there's no mri!"
Master wang is 56 years old. He's usually fit. However, in recent times he had always felt dizzy. At the beginning, he thought his blood pressure was a little high, so he went to the pharmacy and bought the pill. As a result, after two days of depressants, the symptoms of dizziness were not significantly reduced. He went to the hospital。
When he arrived at the hospital, he was examined by his skull ct when the attending doctor learned about master wang. When master wang learned that the doctor had given him a skull ct, he was a little upset, so he said the beginning of the article。
When the attending doctor heard the lord's words, he explained that mri uses magnetic principles, and that you are not suitable for mri tests because you have previously been fixed by fractures, and the steel plate produces magnetic fields. After hearing the doctor's explanation, master wang spoke with his heart and said nothing。
It is estimated that many friends share the same doubts as lord wang, and in order to give you more knowledge and understanding of mri, today's doctor's good words will allow us to talk about the relevant knowledge。
1. What is mri? Can it be detected
The mri is based mainly on the use of a relatively strong external magnetic field, so that the magnetic line of the magnetic field in our water molecules is consistent. Then the magnetic field created by the mri machine suddenly disappears, and at this point the direction of the magnetic line of the water molecules in the human body is suddenly restored to its original shape。
Maybe you don't think that's a good idea. Let me explain here. Everyone has seen the square dance, and in a way the magnetic field is like the square, the atomic core is like the plaza dancer's mom, the electromagnetic waves are like music, the hydrogen atoms dance old boys, and the carbon atoms don't come back in autumn. If we play old boys, we have six moms dancing, and if we don't come back in the fall, we have one so that we can clearly judge the anomaly。
A lot of friends think that since mri is so expensive, it will definitely detect all diseases, but it's not. Mri imaging requires the participation of hydrogen atoms, and the amount of hydrogen atoms cannot be small, otherwise the imaging will be unclear. In general, problems with physical organs (e. G. Skull, spinal column, spinal cord, heart, etc.) can be clearly diagnosed through mri. However, the lung is weak because of its high gas content and low hydrogen atoms. In this case, there is a problem with the lungs and mri is not visible。
Many friends are concerned about the radiation of mri, which is superfluous. The principle of mri imaging is hydrogen atoms, while the principle of ct imaging is x-rays, the former without radiation, and the latter with radiation。
In clinical terms, mri is used to diagnose diseases of the nervous system, soft tissue, osteoporosis, cardiovascular disease, etc. Although it has a wide range of applications, it cannot diagnose all diseases。
Why do many doctors not recommend mri
The mri is expensive:
Mri is more expensive than general inspections. In the case of x-rays, the price per part is around $100, while the cost of an mri is around $700. Of course, this is just what i know about prices, which may vary somewhat from region to region and hospital to hospital。
When examining the patient, the doctor considers the cost of the examination. Generally, cheap tests can be diagnosed clearly, so as not to open expensive tests。
Some friends may have said, since mri is expensive, can't it be cheaper? Indeed, the price of the equipment itself is highly correlated. In general, the price of an mri is around 10 million, and there is a need to regularly add liquid nitrogen to the mri at a price of 10,000, as well as labour, site, electricity, maintenance, etc. In this way, the price of mri would be high。
Longer check time:
General inspections take only a few minutes, but the duration of mri checks varies from 10 minutes to 30 minutes. # health awareness program #
If the patient's condition is stable, there is no problem with longer examinations. But if it's the kind of serious or urgent, it's not the mri。
Some people are not suitable for mri:
Cardiac pacemaker
It is not clear whether you have noticed that, prior to the mri examination, doctors would ask whether there had been any surgery and whether there were any metal items on your body. If there had been a heart support operation, a metal brace, a steel plate in the body, a pacemaker, etc., it would not have been suitable for an mri examination。
This is mainly due to the fact that the metal object itself produces a magnetic field, which will undoubtedly affect the imaging effect of the mri and may, in serious cases, threaten the life of the patient. Health 2022
At the same time, patients with certain mental disorders, such as claustrophobia, autism, etc., are not suitable for mri. This is mainly due to the relatively small space available for mri, which could lead to the occurrence of certain mental disorders。
Some parts are not suitable for mri:
Lung
While the image of mri is clearer and its application is broader, this does not mean that any part is suitable for mri。
In the case of lungs and stomachs, their hydrogen atoms are not too high, so that the imaging may be unclear and thus influence diagnosis. Of course, the stomach is not an mri check-up, but it is not a preferred check-up and it is not expensive. # the health grand prix #
Persons with unstable psychiatric conditions or unwilling to cooperate are not suitable for mri:
The mri takes longer and requires patient cooperation。
If there is some mental illness and the condition is unstable or unwilling to cooperate, it is not suitable for mri。
I am a healer's word, dedicated to sharing health knowledge in a common and understandable language and being a health assistant around you! If you think it's good and good for you, go ahead and forward it to someone who needs it
