The principle is very simple. If a certain area of the brain is active, its brain oxygen consumption will increase.
The reason why fMRI is rarely heard in clinical practice is that it is mainly used in psychological research.
We have said that if psychological research is materialistic, it must be based on anatomy. Therefore, psychologists use this examination as the basis for observing the anatomical activities of the human brain.
Is it useful?
fMRI has its flaws, and the flaw is its low spatial resolution. To improve its resolution, it is necessary to use noise reduction algorithms and other means. You can compare these processing methods to the post-editing of audio and video. Post-editing is naturally too much affected by the operator's human factors, which may distort the original data and cause deviations in the results.
The experimental data is distorted, and medical ethics issues arise.
Because some psychological research results can be applied to difficult social issues, such as the polygraph that was popular for a while, in fact, some experiments used fMRI. If such a polygraph is used in court to judge whether a person is guilty or has committed murder, do you think this problem is a big deal or not?
Furthermore, some lawyers will use fMRI to exonerate murderers, saying that the criminal's EEG is abnormal and indicates a mental illness, thus helping the criminal avoid the death penalty.
Now let's talk about vegetative state, which is a state of abnormal brain activity. According to the principle of fMRI, it can help doctors observe the activity of the patient's brain, which helps doctors judge the prognosis of the patient and whether more radical treatment methods can be adopted.
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As it happens, for a vegetative patient, the most effective thing to do first is not to look at the treatment method, but to determine whether the patient has a chance of being stimulated to wake up.
Here we have to talk about the new classification of vegetative state which is being hotly debated in the medical circle this era and is about to be released.
In the past, a vegetative state was defined as a patient who could not follow the doctor's instructions. Later, it was discovered that one of these patients could open his eyes and his eyeballs could respond to the doctor's instructions. This type of patient was then evaluated by fMRI and determined to have residual conscious activity. Doctors gave this type of patient a more accurate definition, calling them minimally conscious patients, which are different from vegetative states.
After the new classification was made, it was found that nearly half of the previous vegetative patients were not vegetative, but were in a minimally conscious state. This shows that the new classification has a great impact on clinical judgment.
When discussing these latest academic topics, the big guys were inevitably excited. Dr. Charlie was in high spirits and said: Great, great, you, a medical student, actually understand this cutting-edge neurosurgery topic in the world, which shows that you are very interested in and know a lot about neurosurgery.
Xie Wanying could feel Brother Cao's gentle hand patting her back. It was obvious that Brother Cao was also very satisfied with her performance.
Dr. Charlie said that she went to the First Affiliated Hospital of Zhongshan Medical College and participated in the bedside consultation for this patient, and the suggestions given included the fMRI she mentioned.
As expected of one of the world's top neurosurgeons, he is fully versed in cutting-edge medical techniques.
Whether the other hospital will adopt his academic opinion or not, there is no conclusion on the spot. There is a lot of controversy. Who is to blame for the lack of a new classification of vegetative patients in the world?
From this we can see that the standard setting of an industry can directly affect clinical work and patients.
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