What mri of the brain shows with and without a contrast

Magnetic resonance imaging today is considered a highly accurate and sensitive method of diagnosis. Also, this procedure is non-invasive and safe. Today we will talk about what the brain MRI shows, how this procedure is performed and to whom it is contraindicated.

Etiology of magnetic resonance imaging

which shows an MRI of the brain

This procedure is completely harmless and safe for human health. When examining with a scanner, no harmful substances are used, such as, for example, in X-ray diffraction. MRI allows you to identify various pathologies of the brain and blood vessels in the early stages.

Before we figure out when it is necessary to undergo such a study and who should refuse an MRI, let's find out what types of this diagnosis exist. So, modern medicine offers two types of MRI:

  • contrast diagnostics;
  • non-contrast.

In the first case, a special substance gadolinium is used for diagnosis, which is introduced into the body through a dropper. Gadolinium is considered absolutely harmless, and it is necessary so that the doctor can see a clear picture and pay attention to the affected areas of the brain. When conducting a non-contrast MRI procedure, gadolinium is not accepted by the patient.

Many people are interested in what MRI shows the brain without contrast. The result of the study, regardless of the use of gadolinium, is almost always the same. It depends on the technology of diagnostic manipulation. The study of the brain occurs through high-frequency pulses, and the result is displayed on the monitor.

What does the head MRI show? Under the influence of magnetic fields, the diagnostician will be able to view all parts of the brain, in particular:

  • soft tissue;
  • brain structure and contents;
  • bone tissue.

In order to view sections of individual parts of the brain, an MRI scan should be performed. What does such a procedure show? First, the doctor will be able to determine which parts of the head require more detailed research. Secondly, the diagnostician will be able to detect the presence of hematomas, cysts, other neoplasms, malignant processes, etc. For example, MRI of the head can reveal the following ailments:

  • meningitis at the initial stage of development;
  • stroke;
  • vices;
  • causes of epileptic seizures;
  • encephalitis;
  • pathological processes in the vessels;
  • sclerosis;
  • the presence of tumors, etc.

When is an MRI scheduled?

When MRI is prescribed

Magnetic resonance imaging is considered a diagnostic method, but in some cases the doctor may send a patient for an MRI scan to confirm the correctness of the treatment he prescribed. Indications for the passage of such a diagnostic procedure are:

  • frequent headaches of varying intensity;
  • intracranial pressure;
  • frequent and causeless vertigo;
  • violation of motor coordination;
  • sharp loss of visual function;
  • suspicion of the presence of a malignant neoplasm;
  • epilepsy.

In medical practice, there are cases when the doctor refers to a child's MRI. Regardless of the age category of the baby, such a diagnostic procedure will not harm him. What does a child's MRI of the brain show? Similar to the procedure carried out for an adult, magnetic resonance imaging allows you to identify serious ailments at the initial, even latent stage of development.

Most often, babies are prescribed MRI in such cases:

  • in the presence of symptoms, indicating a violation in the functioning of the brain;
  • with frequent and causeless fainting;
  • in case of complaints of persistent headaches;
  • with dizziness;
  • in case of detection of violations in the functioning of the auditory and visual apparatus;
  • with mental retardation.

Let's talk about contraindications

As already mentioned, magnetic resonance imaging is considered one of the high-precision diagnostic methods used in modern medicine. Despite the fact that this research method is absolutely harmless, some contraindications to its implementation still exist.

First of all, I would like to draw attention to the conduct of the so-called tomography with contrast. Before the introduction of gadolinium, it is necessary to find out whether the patient is suffering from renal failure, and how he carries this substance. If you have an allergic reaction, you need to choose an alternative method of research.

It is not recommended to undergo MRI of the brain in such cases:

-
  • while wearing a pacemaker;
  • if there are foreign elements in the body, for example, crowns, implants, prostheses, metal plates, etc .;
  • with claustrophobia.

Of course, being in a confined space will not cause physical harm to a person, but may adversely affect his psycho-emotional state.

Preparing for the procedure

The procedure of magnetic resonance imaging does not require special preparation. Most often, this method of diagnosis is assigned suddenly. Before the MRI of the head is performed, the doctor should talk with the patient. During the conversation, the attending specialist clarifies the following aspects:

  • patient complaints;
  • general symptoms;
  • individual intolerance of a contrast agent;
  • the presence of contraindications.

Clarifying the last two aspects is crucial. If there is a pacemaker during an MRI, his work may be disrupted, which will lead to malfunction of the heart muscle. If the patient has metal crowns, then they are recommended to be removed. Also during the procedure you need to remove all jewelry and other metal products.

How is the procedure of MRI: open the veil

How is the MRI procedure

If you have to deal with such a procedure for the first time, then you should not be afraid for your health at all. Remember that it is completely harmless. Before passing through the new procedure, each person wants to know what to prepare for and what results can be obtained.

So, magnetic resonance imaging is carried out by means of a special apparatus - a tomograph. The man takes a vertical position. During the procedure, the move is strictly prohibited. Otherwise, the results of the study may be distorted.

The duration of magnetic resonance imaging takes from 10 to 45 minutes. The timing depends solely on the evidence and the area of ​​study. MRI using a contrast agent lasts an average of 45 minutes.

The diagnostician or laboratory assistant is in another room, but he can talk to you through the loudspeaker. The results of the study are displayed on a monitor or projector. The diagnostician, if necessary, prints the images and translates them.

MRI conclusion: decipher the result

Based on the obtained images of individual sections of the brain or of the head as a whole, the doctor makes a conclusion. It can be either positive or negative. If there are no pathologies, inflammatory processes, injuries, hematomas and infections, the diagnostician makes a negative conclusion.

A positive conclusion is drawn up if there is any disease, in particular:

  • meningitis;
  • bleeding;
  • changes in nerve endings or brain structure;
  • blood clots;
  • puffiness;
  • abnormalities of the vascular walls;
  • aneurysm;
  • neoplasms of benign or malignant type;
  • foci of inflammation or infection;
  • cracks in the bone tissue, etc.

In addition, magnetic resonance imaging allows to assess the state of connective tissues, gray and white matter, nerve endings and the pituitary gland.

MRI has a number of significant advantages. In particular, by means of this method of diagnosis, it is possible to assess the condition of organs whose size is less than 10 mm.

But there is one major drawback. During the procedure it is impossible to assess the condition of the bone cavity, therefore, it is not possible to detect the presence of stones and other pathologies in this way.

Magnetic resonance imaging is improving every day. The latest devices allow doctors to conduct brain research in a three-dimensional format. Such a procedure is completely harmless and painless. Remember that timely diagnosis is the key to successful treatment and speedy recovery. Be healthy!

Add a comment