Magnetic resonance imaging is an advanced medical imaging technique that uses magnetic fields and radiofrequency pulses to resonate hydrogen nuclei in human tissues to produce energy.
This energy can be detected and converted into a digital signal to form an image, which is widely used in clinical diagnosis and medical research because magnetic resonance is non-invasive, painless, and radiation-free.
In magnetic resonance imaging, the intensity and frequency of magnetic fields and radiofrequency pulses can be adjusted according to different tissue types and lesions, so magnetic resonance imaging has high tissue resolution and spatial resolution.
In addition, by using different imaging sequences and parameters, magnetic resonance imaging can show different tissues, organs, and physiological processes of the human body, such as vascular imaging, neurological imaging, cardiac imaging, and many more.
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In addition to the field of medical imaging, magnetic resonance technology is also widely used in chemistry, biology, physics and other fields. For example, in chemistry, magnetic resonance spectroscopy is used to study the structure and chemical reaction mechanism of molecules, and in biology, magnetic resonance spectroscopy is also used to study the structure and function of biomolecules.
01
Why is "magnetic resonance" recommended not to be done? Most people are still in the dark, or it may have something to do with the 4 points
First of all, magnetic resonance imaging equipment is a large, expensive medical device, so not all medical institutions are able to equip it. This means that some patients may need to travel to a hospital further away for testing, increasing the cost of transportation and time.
Secondly, MRI requires a longer process, usually taking 30 minutes or more. For some patients who need to remain still, prolonged exams can be uncomfortable and fatigued.
In addition, magnetic resonance imaging has certain limitations. For example, for some patients with metallic foreign bodies or implants, having an MRI may pose a risk. At the same time, the test is not suitable for all pregnant women and children.
Finally, although the magnetic resonance imaging technique is non-invasive, painless, and radiation-free, it may still trigger some adverse reactions such as headache, dizziness, nausea, etc. These adverse effects are usually transient, but there have been some serious case reports.
02
What problems can be detected by an MRI?
First, magnetic resonance imaging is a non-invasive examination that uses a strong magnetic field and radiofrequency pulses to produce detailed images of the inside of the human body. These images can clearly show the structure and function of various tissues and organs in the human body.
In the nervous system, magnetic resonance imaging can detect brain tumors, cerebrovascular diseases, encephalitis and other lesions. For brain tumors, magnetic resonance imaging can accurately locate the location, size and morphology of the tumor, providing an important reference for subsequent treatment.
At the same time, magnetic resonance imaging can also detect lesions such as narrowing, blockage or aneurysm of blood vessels in the brain, which helps to prevent the occurrence of cerebrovascular accidents such as stroke.
In terms of bone and joints, magnetic resonance examination can diagnose diseases such as joint inflammation, ligament injury, meniscus injury, etc. For these diseases, magnetic resonance imaging can clearly show the lesions inside the joint, which provides an important reference for doctors to formulate treatment plans.
In addition, magnetic resonance imaging can also be used to examine abdominal organs, such as liver and kidneys. For liver tumors, kidney stones, and other diseases, magnetic resonance imaging can provide accurate diagnostic information and help early detection and treatment.
03
How many questions do I need to pay attention to when performing an MRI?
First of all, inform the doctor in advance about your physical condition and the metal object you are carrying. This is because MRI requires a strong magnetic field, and if there is a metal object in the body, it may cause certain interference and affect the results of the examination.
Therefore, before the examination, it is necessary to remove all metal objects carried by the body and inform the doctor of your physical condition so that the doctor can determine whether it is suitable for an MRI examination.
Second, stay calm and cooperative. During an MRI, you need to stay still so as not to affect the results.
At the same time, it is necessary to stay calm and not panic, so as not to affect the doctor's operation. During the examination, if there is any discomfort or abnormal sensation, it is necessary to inform the doctor in time so that the doctor can deal with it in time.
In addition, it is important to pay attention to the diet and medication intake before the examination. Before the MRI examination, it is important to avoid overeating and taking medications to avoid affecting the results of the examination. Especially for some tests that need to be done on an empty stomach, it is necessary to prepare in advance.
Finally, it is necessary to pay attention to the interpretation and follow-up treatment of the examination results. After the MRI examination, the doctor will give a diagnosis and treatment recommendations based on the results of the examination.
If the test results are abnormal, you should seek medical attention in time, and follow up treatment and follow-up tests according to the doctor's recommendations. At the same time, it is important to maintain a healthy lifestyle and actively cooperate with the doctor's treatment and advice in order to recover as soon as possible.
04
Does magnetic resonance really have radiation?
First, we need to understand how magnetic resonance works. It uses a powerful magnetic field and radio frequency pulses to resonate the hydrogen nuclei in the body to produce an image.
In this process, there is no energy release in the form of X-rays or electromagnetic radiation, so in theory, magnetic resonance does not produce radiation.
However, although magnetic resonance itself does not produce radiation, there are some precautions that need to be observed in practice in order to ensure patient safety and proper operation of the device.
For example, before entering the MRI room, patients need to remove metal objects from their bodies to avoid disturbing the magnetic field or causing accidental injury. In addition, for some specific groups of people, such as pregnant women, claustrophobia patients, etc., special treatment may be required on a case-by-case basis.
It is worth mentioning that although magnetic resonance does not have radiation, some people still have some concerns about it. This is mainly because magnetic fields and radio frequency pulses can have a certain effect on the human body.
For example, a strong magnetic field may raise the temperature of the implant in the body, and some patients may even experience symptoms such as mild headaches, nausea, etc. Therefore, before performing an MRI, the doctor needs to conduct a thorough evaluation of the patient to ensure that it is safe.
In summary, magnetic resonance itself does not produce radiation, but it is necessary to pay attention to some details in the actual operation, and under the guidance of professional doctors, magnetic resonance is a safe and reliable medical imaging examination method.