The nuclear magnetic resonance examination can provide your body parts, especially the precise details of soft tissue with the help of magnetic fields and radio waves.It can diagnose more diseases such as stroke, cancer, traumatic brain injury.
However, there are certain risks of MRI, and many patients on the Internet share their own experience of doing nuclear magnetic resonance.Many people are affected because of their strong side effects due to this project.Not only that, there was an Indian man who missed the nuclear magnetic resonance room in the hospital. The machine was running. The powerful suction took away the oxygen cylinder in the man’s hand. The man died unfortunately because of the inhaled liquid oxygen in the bottle.
Today, many patients, especially the elderly, are strongly required to conduct nuclear -magnetic resonance examinations when they see a doctor, fearing that their conditional examinations will not be comprehensive.However, do you know why many doctors do not recommend nuclear magnetic resonance?The doctor tells you the truth.
The security problem of nuclear magnetic resonance is based on its two core components, one is a powerful magnetic field, and the other is a radio frequency field.The magnetic field will have a certain impact on physiological activities.For example, the blood flow under the strong magnetic field will generate a sensitive current, and the electrocardiogram will change slightly.
In 2017, the 10th World Health Organization included radio frequency radiation in the carcinogenic list.The impact of radio frequency electromagnetic radiation on humans is mainly neurasthenia syndrome, such as fatigue, sleep disorders, memory loss, emotional instability, sweating, hair loss, and weight loss.
Plant nerve dysfunction is mainly manifested in the slowdown of heart rate, decreased or elevated blood pressure, pain in the front area of the heart, and chest tightness.Women often have symptoms of menstrual cycle disorders, and individual men have sexual dysfunction.Microwave radiation can also affect the decline in the total number of blood white blood cells, dot -shaped or small -shaped turbidity of the eye crystal.
Metals (such as pacemakers, etc.) in the body may have hidden safety hazards.The pacemaker and electrode wire will affect each other with the energy scanned by magnetic resonance imaging (MRI), which may cause the device in the implantation to be shifted and even fail.It is also possible that the head end of the wire can cause endometrial burns, or cause arrhythmia or even cardiac arrest.
The contrast agent used by MRI may cause short -term slight side effects, such as dizziness, rash, headache or feel uncomfortable.One of the most commonly used drugs in radiological operations in the angioma room is mainly used for the display of blood vessels and body cavity, and is also widely used in the MRI examination.
The amount of contrast agent is an independent risk factor that causes the kidney disease of the contrast agent. The health of patients with nuclear magnetic resonance for a long time will also be affected by the proofing agent to a certain extent.Patients with a history of allergies, severe cardiovascular disease, kidney disease, brain injury and other patients are not recommended to use a film makeup, so it is not recommended to pass the nuclear magnetic resonance for examination.
When doing nuclear magnetic resonance, patients should lie on the inspection table quietly and talk to the technicians through a microphone. The machine is noisy at runtime. Patients need to wear earplugs.For patients who are afraid of a closed environment, this examination is a great test for psychological pressure, which is prone to adverse emotions and is not conducive to the disease.
At the same time, it may cause hearing damage for patients with obstacles.It is difficult for many people to understand why the nuclear magnetic resonance sounds?At the same time, it is inevitable whether these noise will be harmful to the human body.Therefore, many people often feel nervous when they do inspection, and they will unconsciously twist their bodies, which will cause the image to blur.
Checking costs are more expensive than general inspections, and many families are difficult to afford.The cost of nuclear magnetic resonance is between 600-700 and different fees in different regions, while ordinary CT examinations are generally between 100-200 yuan.MRI is expensive.A nuclear magnetic resonance imaging instrument costs $ 500,000 to $ 1 million, and the cost of MRI’s maintenance is high, so the charging standards for MRI.
If not, you can use other inspection methods instead of nuclear magnetic resonance, such as CT, B -ultrasound, X -rays.For families with constantly economic conditions, doing nuclear magnetic resonances undoubtedly increase the burden on the family and increase the cost of inspection.
Nowadays, the medical level is developed, and there are many ways to check the disease at patients.You can choose the most suitable method after communicating with your doctor in detail, and will not have much negative effects on your physical condition and economic conditions.This requires the doctor’s appropriate consideration and the patient’s understanding.
The principle of B -ultrasound is to penetrate the human body with ultrasound.When sound waves encounter human tissues, reflex waves will be generated. By calculating the image of reflex waves, it can be observed in real time and multi -angle. It is better to use soft tissue imaging, such as thyroid, breast, abdominal organs.interference.
Type B is the main method of checking the ultrasound. The development of ultrasound has made rapid progress, such as endoscopic ultrasound, ultrasonic angiography, three -dimensional imaging, elastic imaging, etc., all developed on the basis of type B ultrasound.
The main principle of CT’s inspection is that different tissues and organs of the human body have different degrees of attenuation of X -ray.Express this difference in the image in the image with different grayscale.With the development of CT technology, the current commonly used spiral CT can achieve the collection of data along the long axis of the human body, and obtain a two -dimensional arbitrary angle and three -dimensional images through image reorganization and reconstruction technology.For bone structure, lung, and bleeding, the disadvantage is that there are ionizing radiation, and the soft tissue is poor.
CT examination also has a certain advantage, because the examination time is relatively fast, and the patient’s clinical coordination requirements may be low, and the appropriate examination will be selected according to the patient’s different situations.Some patients with a pacemaker, patients with cochlear implants, or patients who have closed phobia cannot do magnetic resonance examinations, clinicians will also do appropriate screening.
In short, the nuclear magnetic (MR) is in the magnetic field, emitting ejaculation pulses to resonate the atoms (mainly hydrogen) in the human body.When the pulse disappears, the hydrogen atom gradually stops resonance and releases energy. By receiving such energy and complex operations, the nuclear magnetic images we see are obtained.The advantages of magnetic resonance checks are multiple parameters, such as: T1, T2, diffuse imaging, fat suppression of imaging, etc. Each parameter reflects specific information.Therefore, diagnosis of lesions is also more comprehensive.In addition, magnetic resonance inspection soft organizations compare CT high.
Usually, a doctor will choose the appropriate examination according to the patient’s clinical symptoms and medical history. Some patients need to do magnetic resonance, and some need to be CT.What type of disease must be MRI?
1. Neurological disease
Early cerebral infarction could not be found on CT, but in the magnetic resonance, the infarction site and the acute phase of the infarction, the sub -acute period, and the chronic period can be found.
2. Tumor disease
Cancer patients do magnetic resonance, which can clarify the relationship between tumor parts, size, form, and surrounding tissue, and can clear whether there is a metastasis around. The resonance resonance resonance in this regard is significantly higher than that of CT.For the damage to the soft tissue of the joints, the magnetic resonance is also very advantageous. It can display the half -moon plate, ligament, joint cartilage, and synovial membrane in the joints.
3. Spinal degenerative disease
CT examination is better than MR for osteogenesis and ligament ossification, but the display of MR on disc, spinal cord and nerve roots is better than CT.Which other groups are not suitable for nuclear magnetic resonance?
Patients who have been unconscious or restless cannot do magnetic resonance examinations.Because the magnetic resonance needs to scan for nearly 20 or 30 minutes, very critical patients are hard to bear at all. When their condition improves slightly, some consider magnetic resonance.
A more restless children or elderly people are not allowed to do magnetic resonance examinations.Because they cannot cooperate well for inspections, it is easy to cause inspection failure, so such people are not suitable for magnetic resonance.
Pregnant women in the middle of pregnancy are not recommended to do MRI.Nuclear magnetic resonance examinations will scan the body in all directions. Radiation will affect the baby’s development. Especially in the first three months of pregnancy, the embryo is in the period of cell differentiation and development.At the same time, contrast agents are not recommended for pregnant women.Nowadays, B -ultrasound technology can fully check the status of pregnant women and babies. If you want to conduct nuclear magnetic resonance examinations, you need to obey the doctor’s advice and decide carefully.
1. Do not bring metal objects into the inspection room
Metal objects are prohibited from bringing the MRI to the nuclear magnetic resonance examination room, otherwise the consequences will be unimaginable.Before the machine is started, the technician will remind and check whether the patient wears metal objects, but sometimes there will be omissions.
Magnetic things will be thrown in the examination room, sucked into the magnetic field, and will pass through the magnets after being sucked in, forming irregular movements.It is easy to accidentally injury patients and doctors in the room, so these things are strictly prohibited to bring in.There is no problem with pure gold, sterling silver, and pure titanium, and can be taken in, and the others cannot be brought in, such as keys, mobile phones, watches, etc.
2. Be sure to inform your doctor’s history of surgery
Many people do not understand the nuclear magnetic resonance, and believe that as long as there is a disease, it can be detected well.In fact, this is not the case. There are taboos and indications for magnetic resonance.We must fully understand and understand this in order to achieve scientific effective examination and treatment.
People with implantation or metal implants of the pacemaker are not allowed to perform magnetic resonance examinations.And those who have fixed metals who have fractures cannot do this inspection.
3. Girls need to remove makeup before checking
Cosmetics contain a large amount of metal substances (mercury, arsenic, lead, cadmium), etc. The magnetic field of MRI will react with the metal substance.Lipsticks, foundation liquid, eye shadow, nail polish, etc. need to be removed before entering the examination room.Although love beauty is a human nature, every girl will dress out, but for her own health, she still tolerates when doing nuclear magnetic resonance inspections!
4. Keep static and relax
When checking, you need to lie down with your eyes and keep static.Because the space of lying down is slightly smaller, patients who stay in a small environment for a long time will feel anxious, and patients with diseases in the nerves need to pay more attention.If you move during the inspection process, it will affect the test results.
The decibels of the nuclear magnetic resonance machine are about 90.Some patients may have such doubts: Why do the machine continue to make a ding and impact sound during the inspection?
Due to the noise of the machine for a long time, some patients may have a short discomfort after the examination, and it takes a few hours to recover.So you need to relax to accept this inspection.
5. I feel uncomfortable and stop immediately!
Nuci magnetic resonance generally takes more than 15 minutes, and you feel that uncomfortable timely, please inform the technicians immediately.Sometimes check because the actual situation will even be extended to 1 hour. This process requires your persistence, but if the body is really uncomfortable, use the microphone around you to stop the inspection even if the technician is informed.The current physical condition is the most important.
The development of modern medical care, the nuclear magnetic resonance examination benefited many patients, and there were certain harms.The side effects of MRI should be understood by more people.
Why doctors do not recommend that there is a reason for MRI to do nuclear magnetic resonance. If the nuclear magnetic resonance must be done, the patient needs to communicate clearly with the doctor to avoid increasing psychological burdens.Comprehensive inspections can be in place to avoid waste of money, but sometimes there are not serious results, which requires doctors to communicate more with patients and then choose.
Everyone needs a healthy and good body to stay away from the disease.Everyone must always pay attention to their health, exercise together, and eat well!