Diagnostic procedure using magnetic resonance imaging is a modern and safe method of studying the vessels of the brain. This type of diagnosis allows timely and with high accuracy to identify abnormalities and pathologies in the functional state of the intracranial circulatory system.
This method is a good alternative to radiography, which adversely affects human health. MRI allows you to obtain a detailed image of various parts of the brain and its trunk.
Why do MRI of the brain vessels
MRI allows you to recognize the disease at an early stage and start the appropriate therapy in time. With the help of this diagnostic method, the physician has the opportunity:
- to obtain complete information about the anatomical and physiological characteristics of blood vessels;
- give an assessment of what is happening in the brain tissue of physicochemical and biological processes;
- get an image of blood vessels in the study area;
- to make an accurate diagnosis and develop on its basis the most comprehensive list of therapeutic measures;
- examine the vessel at a large extent without the introduction of contrast agents and severe radiation;
- learn about the exact location and size of hematomas, blood clots, vascular anasthenia with pathological changes and aneurysms;
This study is conducted by physicians with a wide range of specializations. Those interested in a full diagnosis of the state of cerebral vessels may be neurologists, surgeons, therapists. Pathological changes in intracranial blood supply may indicate the presence of a variety of diseases.
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What will show the MRI of cerebral vessels
Earlier, when the inside of the brain could "look" only by resorting to the method of radiography, reliable information about what is happening in the tissues and blood vessels inside the skull was rather problematic.
The situation has changed with the advent of the MRI method. The use of magnetic resonance imaging allows you to see:
- structural disorders in the brain tissues, tumors;
- signs of a stroke;
- manifestations of multiple sclerosis of blood vessels;
- presence of hemorrhages and concussive changes in trauma;
- aneurysms and vascular ruptures( malformations);
- presence of intracranial hematoma;
- presence of thrombi and their location;
Earlier, with concussion of the brain, it was difficult to detect the presence of all areas of concussion and hematoma, then with the introduction of the MRI method into medical practice it was a simple and quick process. In time, the revealed effects of concussions make it possible to avoid the development of complications in the future.
The situation is also the same with the identification of micro strokes - they can be seen at the earliest stages of their development and take the necessary measures on time, avoiding undesirable consequences. In addition to diagnosing the condition of the vessels, this method allows us to examine brain tumors in detail and to determine their location in millimeter to the nearest, which is very important in cases where surgical intervention may be required.
Magnetic resonance angiography
This method of magnetic resonance imaging is designed exclusively for studies of cerebral vessels. This method is safe and allows you to quickly obtain the necessary information for diagnosis and subsequent treatment of diseases associated with blood supply to the brain.
It allows you to study the anatomical and physiological features of the circulatory system in any area of the brain of interest to the brain. Identifying abnormalities in the early stages and prescribing appropriate timely treatment, it is possible to significantly improve the prognosis of the development of the pathological process.
Based on the data obtained as a result of angiography, it is possible to fully plan surgical operations on the vessels of the brain - such as stenting and angioplasty.
Angiographic examination allows you to study not only large vessels of the brain, but also the smallest capillaries in any part of the brain tissue. The method also allows you to study the lymphatic system of the brain - which is also necessary for the diagnosis and therapy of certain diseases.
Often such a method of studying the blood circulation of the brain makes it possible to do without even introducing a contrast medium into the blood. Contrast materials in the combined technique of computed tomography and angiography are used only in the study of brain tumors.
Brain MRI devices
The physical phenomenon underlying the tomographic study is nuclear magnetic resonance, a measure of the response of tissues to electromagnetic radiation in a high-voltage magnetic field.
Much depends on the characteristics of the device for MRI diagnostics, and first of all the reliability of the information obtained. Standard power for qualitative research is a value of 1.5 Tesla.
The standard unit is a large, cylindrical tube surrounded by a magnet. The patient is placed on a movable table, which during the procedure is moved into the tunnel. There are tomographs with a short tunnel, designed so that the magnets surround the table with the patient not completely.
There are open-ended devices that are designed for patients with excess weight or who suffer from claustrophobia .Modern machines with a capacity of 1.5 Tesla and higher allow to obtain high-quality images, however, if old magnets are used in open-type devices, the quality may suffer.
The computer data processing system is usually located in a nearby office.
Indications for MRI of the brain
The study is appropriate at the stage of disease detection, as well as at the stage of confirmation of the doctor's diagnosis. Specific indications for MRI are:
- dizziness and headaches of various types and severity;
- head injury and cervical region;
- concussion;
- vision or hearing impairment;
- tinnitus;
- regular nasal bleeding;
- fainting and short-term loss of consciousness;
- suspicion of diseases of the nervous system or the presence of these diseases;
- stroke;
- ischemic disease;
- vegetative-vascular dystonia of different types;
- aneurysms( deformations) of cerebral vessels;
- encephalopathy;
- Parkinson's disease;
- is a migraine;
- suspicion of a brain tumor or its presence;
Whether the
MRI procedure is safe The conducted statistical surveys of more than 150 million revealed that the procedure is completely safe for the patient's health, subject to appropriate safety measures.
Only qualified and technically trained specialists are authorized to conduct a tomography scan. It is also necessary to remember the contraindications to this method.
Preparation for MRI of the brain
The magnetic field of the device is quite powerful and can attract metal( ferromagnetic) objects. Such objects can start moving at high speed towards the center of the magnetic resonance system. This can create dangerous situations for patients and staff.
Before starting the procedure, it is very important to delete such objects. It can be:
- watch;
- decoration;
- hearing aids;
- credit cards;
- pins, hairpins;
- lighters;
- dentures;
- glasses;
- fountain pens;
- body piercing;
- metal parts of clothing;
The study should be conducted in loose clothing, so medical personnel can ask the patient to change their hospital clothes. Regarding the reception of food and liquid before the procedure, there are no contraindications.
Diagnosis may require the introduction of contrast materials into the blood, so the patient should inform the doctor of the presence( absence) of allergies to these substances.
It is also necessary to inform the doctor about any illnesses that have been carried out in the recent past. Pregnant women should always inform staff about their condition.
How the procedure passes MRI
The patient lies on the movable table. To fix the position, special rollers and fastening belts are used. Around the patient's head are placed wires that send and receive radio waves. If a contrast material is required, it is inserted into the vein through the catheter.
The table is placed inside the magnetic tunnel, the medical staff leaves the office. An MRI scan is performed, after which the doctor can ask the patient to wait until all the images have been analyzed and, if necessary, can take an additional series of pictures.
All procedures last approximately 30-45 minutes.
Sensations during the procedure
The procedure itself in the vast majority of cases is completely painless. Some patients may experience discomfort due to the need to lie completely still during the study. Patients with claustrophobia before the procedure are offered sedatives.
During the procedure, there may be a local increase in the temperature of the head - this phenomenon is considered the norm. If this causes the patient to worry, you need to report your feelings to the doctor. It is important that at the time of making a series of pictures the patient lay absolutely motionless. Sometimes a doctor may require that the subject briefly hold his breath.
The beginning of scanning and shooting is accompanied by a tapping sound produced by the magnet when creating high frequency pulses. Between the series of images the patient can relax for a while. During the procedure, the patient is in the office alone, but he can talk to the doctor using a two-way communication system.
Some clinics include relaxing music during the scan. The patient can ask the doctor earplugs or headphones to muffle the loud sound inside the device. The MRI system is air conditioned and well lit.
Risks of MRI of the brain
The risk of the procedure may include:
- overdose of sedatives;
- development of allergies to contrast materials;
- complication arising in the kidney due to the use of contrast agent gadolinium - this situation is extremely rare;
Results of Magnetic Resonance Tomography
The result of tomography is a series of images that are analyzed and studied by a radiologist. Interpretation of the analysis and subsequent diagnosis is the responsibility of the attending physician who appointed the study. The patient may take a conclusion about the pictures from a radiologist.
With the help of MRI, a doctor can detect the presence of various pathologies in the vessels of the brain or obtain confirmation of a previously diagnosed disease.
Contraindications for Brain MRI of the
This study is not available or performed with caution in patients with:
- foreign bodies in the body - such as pacemakers, artificial heart valves, artificial joints, dental plates and pins;
- is an allergy to contrast materials;
- heart failure;
- tattoos with iron-containing dyes;
- with insulin pumps;
Features of MRI for children and pregnant women
This procedure for pregnant women is prescribed only in extreme cases, although pregnancy is not an absolute contraindication for MRI.It is not recommended to introduce pregnant women contrast materials
For children, the procedure is harmless. A prerequisite for an MRI for a child is the use of headphones while in a scanning tunnel. It also requires appropriate psychological preparation of the child by parents and medical personnel.
Cost of MRI
The cost of the procedure depends both on the clinic itself and on the equipment at which the examination is performed. The cost of contrast material is also taken into account. The table below lists the major clinics in Moscow and other cities where you can make magnetic resonance imaging for the prices offered in them.
| CLINIC | PRICE OF PROCEDURE IN RUBLES |
| Rehabilitation centers of Dikul, Moscow | 3200 |
| Medical center of Prima Medic, Moscow | 3500 |
| Medical center at Botkinsky, Moscow | 5500 |
| Physiomed clinic, Moscow | 4100 |
| Center of magnetic resonance imaging, Saint-Petersburg | 3000 |
| Diagnostic Center D-Med, St. Petersburg | 3300 |
| Berezina Medical Center, Novosibirsk | 2600 |
| Avicenna Medical Center, Novosibirsk | 2500 |
| International Tomography Center, Novosibirsk | 4500 |
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Video revealing the features of carrying out the procedure of MRI of the brain: