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Decryption of analyzes

MRI of the brain and blood vessels: results, contraindications, evaluation

The brain is responsible for all the processes that occur in the body: heartbeat, respiration, digestion, motor responses, mental activity, emotions depend on its functioning. It weighs about one and a half kilograms, and the human intellect, talent and success are in no way connected with either the volume or the mass of gray matter or the race of a person.

Our domestic famous scientists I.P.Pavlov and I.M.Sechenov proved that the physiological function of the brain does not carry anything mystical, supernatural. Disorders in the activity of the brain arise due to an objective change in its structure.

This scientific position has allowed doctors to choose treatment methods based on the materiality of its substance. A major problem was the inaccessibility of the organ for direct study of the substance. For researchers of the 19th century, only trepanning of the skull (removal of a part of the skull) made it possible to approach the brain tissue.

In 1895, V. Röntgen (Röntgen) made the greatest discovery, perpetuating his name. Using x-rays, doctors without surgical intervention began to visually study the pathological processes hidden deep in the patient's body. But - radiation was dangerous, which limited the application. The second drawback of X-rays is that it poorly “distinguishes” soft tissues due to the fact that they all absorb about the same amount of rays.


What is MRI of the brain and blood vessels?

MRI of the brain and blood vessels

And just forty years ago, a chemist Paul Lauterbur reported that hydrogen atoms underwent a resonant oscillation under the influence of a magnetic field, and it is possible, when passing radio waves through excited nuclei of hydrogen, to record changes in the waves in the form of a kind of “echo” . This is how a new method of studying the processes occurring in the body, magnetic resonance imaging, was born. The author deservedly received the Nobel Prize for this discovery in 2003.

During the examination, the device rotates around the table with the patient lying down, making layered images of the organ of interest to doctors. Moreover, the more water (and therefore of hydrogen) contains fabric, the more informative the image is obtained. The method is ideal for studying the soft substance of gray matter. It is completely harmless and can be carried out repeatedly.

An MRI scan of the brain and blood vessels is a clear three-dimensional image of structures lying at any depth. In the study of white matter, which consists of processes of nerve cells that conduct signals from the organs to the brain centers and back, they conduct MR-tractography to detect traumatic, toxic or radiation damage.

The circulatory system of the brain is studied using MR-angiography. To get a clearer picture, contrast agents are used - in the study of the brain, this is usually the chemical element of gadolinium. By contrast and resorted to a detailed examination of the departments, for example, the cerebellum.

What does a brain MRI show?

What does an MRI scan of the brain

The method of MRI diagnosis shows the doctors:

  • brain tumors at any stage of development,
  • hematomas
  • cysts,
  • hydrocephalus,
  • abscesses,
  • diseases of the cerebral cortex
  • post-traumatic disorders
  • hormonal failure - a change in the state of the pituitary gland,
  • in multiple sclerosis - foci of structure destruction,
  • just 2-4 hours after a stroke, ischemic lesions.

MRI of brain vessels detects:

  • the degree of narrowing of the lumen of blood vessels
  • the number of narrowed areas of vessels and their length,
  • the degree of restoration of cerebral circulation due to the development of collateral (bypass) vessels at the site of ischemic injury.

Indications for brain MRI

MRI of the brain is performed if the patient notes:

  1. Regularly occurring headaches.
  2. Fainting and other clouding of consciousness.
  3. Unreasonable dizziness and deterioration of the function of the vestibular apparatus.
  4. Reduced vision or hearing.
  5. Cranial nerve dysfunction.
  6. Sharp weakening of memory.
  7. Violation of the sensitivity of the limbs or certain parts of the body.
  8. The growing feeling of weakness in the limbs.
  9. Injured.
  10. Suffered a stroke.
  11. Parkinson's and Alzheimer's.
  12. Epilepsy.
  13. All stages of meningitis .
  14. Monitoring the status before the operation or after it.

Contraindications for MRI of the brain and blood vessels

Contraindications for MRI of the brain are few, and among them there are no specific, relating only to the study of the brain. Mr tomography of any part of the body is not carried out in the presence of metal objects or electromagnetic devices:

  • pacemaker or artificial heart valves,
  • endoprosthesis of the middle ear,
  • insulin pump,
  • metal spokes or staples after injuries
  • metal dentures,
  • shell fragments,
  • head and neck tattoos using metal-based dyes.

The first and last trimester of pregnancy to avoid unintended consequences are also included in the number of contraindications.

An abnormal blood circulation in the brain requires a careful approach when prescribing an MRI.

Due to the fact that the examination lasts about 30 minutes, it is not recommended for people with an unstable psyche, young children and patients who experience severe pain that will not allow them to stay in one position for so long.

If you plan to conduct an MRI with contrast enhancement - there may be difficulties in people with allergies and some types of anemia.

Excessive weight makes it difficult to conduct the survey due to the impossibility of placing large patients in the tomograph chamber. In such cases, open MRI is appropriate.

How is the examination procedure?

Preparing for an MRI does not require testing or adherence to a special diet. On the appointed day, the subject comes with a passport and an insurance policy. If there are extracts from previous examinations and recent analyzes, it is better to take them with you so that the doctor can interpret the results correctly.

In a separate room, the patient leaves the clock, telephone, jewelry, metal hairpins, changes into special clothes and goes to the room where the MRI scanner is located. With the help of medical staff is located on a horizontal table, which is then pushed into the chamber of the device.

The camera is equipped with ventilation, lighting, intercom for contact with a doctor. When rotating, the scanner makes a lot of noise, so it is often necessary to put on headphones with or without music to reduce the level of discomfort to the patient.

It is very important to lie without movement during the examination, otherwise the layer-by-layer images will be blurry, fuzzy.

Evaluation of the analysis results

MRI decoding

Decoding an MRI requires a professional approach.

In the obtained images, the specialist assesses the structure of the brain, the configuration of its divisions, the size and shape of the ventricles of the brain, the density of tissue in different areas, reveals areas of necrosis, ischemia, and tumor processes.

But MRI, with all the clarity of the results, is only an auxiliary method of examination. The diagnosis is made on the basis of all analyzes and studies, taking into account the symptoms of a particular patient. This can only be done by a doctor specializing in this area of ​​medicine.

The cost of MRI examinations

The cost of MRI of the brain can vary greatly depending on the category of clinic and prestige, as well as the type and volume of diagnostic measures.

Primary review MRI of the brain usually costs in the amount of 3 thousand rubles. The study of the venous system of the brain - from 5 thousand. Full contrast MRI tomography in the range of 10-20 thousand rubles. (* summer of 2016).

MRI devices are becoming more affordable, even for small regional centers. This will help those in need to avoid extra costs associated with the examination itself and the need to travel to large clinics.


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