The organ of vision is an important part human body. With the help of their eyes, people distinguish colors, recognize volume and shape, and distinguish objects at different distances from them. The visual system helps not only to clearly see the world around us, but also to quickly adapt to unknown terrain, reducing the risk of injury in everyday life. With the development of various pathologies of this organ, not only visual acuity decreases, but also quality of life, which can lead to disability with limited ability of a person to self-care.
MRI of the eye - a modern examination method visual system, which opened new horizons for diagnosing diseases organ of vision. The study is aimed at a detailed study of the soft tissues of the area under study, namely eyeball, optic nerve, lacrimal glands, muscular system and nearby structures.
To obtain a high-quality and detailed image, the human body is exposed to harmless magnetic waves that interact with hydrogen atoms in tissues human body. The consequences of such reactions are recorded and processed by modern equipment, after which they are converted into clear to the eye picture.
The human eye is a complex and fragile system that is easily susceptible to injury and various diseases. Any inflammatory process or damage in the orbital area can be life-threatening due to the close proximity to meninges and sinuses. Therefore, magnetic resonance imaging is simply irreplaceable for screening ( early diagnosis).
Let's discuss its advantages:
Disadvantages of orbital MRI include poor visualization bone structures. Therefore, if you suspect traumatic or other damage to the walls of the orbit, it is better to give preference computed tomography.
If the patient has metal in the head area foreign bodies, crowns or dentures, MRI diagnostics will also be uninformative due to reduced image quality.
What symptoms can be a signal for prescribing an MRI of the eye orbits and optic nerves? A doctor can issue a referral for a procedure if a person has the following complaints:
Reduced visual acuity of unknown origin is an indication for MRI of the orbits
This type of diagnosis is indicated for the following pathologies:
Particular attention must also be paid to the diagnosis of pathologies optic nerve, which serves as a way to transmit visual images to a certain area of the brain for their further processing. Its damage or atrophy can lead to significant visual impairment in the presence of completely healthy eyes.
An MRI of the eye can be performed either with the direction of the attending physician or independently. The exception is the use of contrast. In this case, before the study, the patient must undergo a fundus examination and undergo general clinical tests ( general analysis urine, complete blood count and blood biochemistry). This is necessary to exclude severe damage to the liver and kidneys, in the presence of which the introduction of dyes is contraindicated. Also, the procedure using contrast is prohibited for pregnant women and women during lactation.
Before starting the examination, you must remove all metal items from yourself, including watches, earrings, rings, and also lay out mobile phones and credit cards. All these objects will interfere with the magnetic field and the result of the study will be unreliable. If intravenous administration of a contrast agent is expected, the procedure is performed on an empty stomach.
Diagnostics begins with the patient being placed on a horizontal movable surface, which drives into the tomograph tunnel. Next, the area under study is scanned in various planes. This lasts on average 30–40 minutes. When using contrast, the time increases to one hour.
During the procedure, it is necessary to reduce motor activity to a minimum, otherwise the anatomical structures, as shown by MRI of the orbits, may become blurred. Poor visualization will significantly complicate diagnosis and may cause delay therapeutic measures.
The radiologist's report does not confirm the diagnosis, but describes the changes identified during the procedure
After completing the study, the patient is given the diagnostic data on film, disk or flash drive. It is also possible to send information by email. The specialist draws up his conclusion after some time, which depends on the specific clinical case. With these documents, you should contact your doctor, who will confirm the diagnosis and begin treatment measures.
MRI of the eye orbits is a modern diagnostic method various diseases eyeball, pathological processes in the orbital area, damage to the optic nerve, assessment of adjacent tissues.
MRI of the eye is a very effective and efficient examination method, as it allows not only to examine pathological area, but also volumetrically model various processes in several projections. Adjacent tissues are also examined: eye muscles, optic nerve, retrobulbar space, blood vessels, fatty tissue.
An MRI of the eye orbits itself takes about 20 minutes; with contrast, the examination time increases to 40 minutes. This examination does not require special preparation; the patient simply comes for diagnosis at the appointed time.
The procedure is safe for the patient; the contraindications are the same as general contraindications for magnetic resonance imaging:
Early MRI diagnosis of diseases of the eyeball and orbit allows not only to stop the pathological process, but also to restore vision.
Briefly about the tomography center "MedSeven"
Address:
Moscow, metro st. 1905, no. 7, building 1
Working hours:
seven days a week, 24 hours a day
Equipment:
Powerful Philips tomograph 1.5 Tesla
When registering please provide your car number
In our clinic, an MRI of the eye orbits costs 3,500 rubles. This kit includes:
It should be noted that the cost may vary depending on the scope of the study. If necessary, the attending physician may prescribe an MRI with contrast, in which case the cost of the procedure will increase. A specialist may also need additional research brain, cervical spine spine. For separate price If desired, the doctor can write the study results to disk.
Our consultants will tell you the exact price only after an examination by a doctor or based on the results of a referral issued by a specialist.
In Moscow clinics, prices for MRI of the orbits can vary from 3,000 to 6,000 rubles. When choosing a clinic, pay attention not only to the cost of the procedure, but also to the quality of the images obtained, the professionalism of the description and conclusion, and the power of the device itself.
| Description | Price | Until October 24 | Price from 21:00 to 9:00 |
| 5,000 rub. | 4,250 rub. | RUB 3,750 | |
| Study with contrast "Magnevist" | 6,500 rub. | 6,000 rub. | - |
| Issue of film with photograph | 500 rub. | 400 rub. | 400 rub. |
| Recording a photo on flash | 1,000 rub. | 650 rub. | 650 rub. |
Magnetic resonance imaging is a method of diagnostic examination of various human organs, combining the knowledge of nuclear physics and medicine. This method is just under 60 years old, but it began to be actively used only at the turn of the last and present centuries directly for research internal organs and brain. A little later, the method gained great popularity in ophthalmology for diagnosing eye diseases, the cause of which is not visible during visual examination. MRI of the orbits and optic nerves allows us to detect the slightest changes in various tissues and structures of the eye that affect a person's ability to see. This means that this method helps to identify the disease in its initial stage and begin treatment when it is most effective.
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Magnetic resonance imaging is considered one of the safest and most effective ways to identify various pathologies the eye, carefully examining internal structures that are not visible to the naked eye and not visible during microscopic examination. In addition, the more modern MRI method helps to see such minute changes in the eye that cannot be studied using older methods.
Due to high diagnostic value MRI of its orbits can be prescribed when diagnosing the most various pathologies eyes:
Using MRI, you can determine the location of foreign bodies in the internal structures of the eye, identify inflammatory foci and assess their size, find hidden tumors and, under MRI control, take material for a biopsy.
If there has been an eye injury, MRI allows you to evaluate its consequences and complications, the size and nature of damage to internal structures as a result of the injury, and treatment options in each specific case.
When a person's vision deteriorates or motor activity eye (strabismus appears, the patient cannot focus vision on a specific object), it is simply impossible to determine the cause without examining the internal structures. MRI makes it possible to see and evaluate the degree of damage (atrophy) to the muscles or nerves responsible for eye movement, and to outline measures to correct the defect.
Quite often, the cause of visual impairment and pain is hidden from us, and it can only be detected by virtually penetrating inside the eye, observing its work, and assessing the changes occurring there. This is precisely the opportunity that magnetic resonance imaging provides. And although the procedure is called MRI of the orbits, in fact it also allows one to visualize disorders of the visual muscles, nerves and lacrimal glands, pathologies of the eyeball, and changes in fatty tissue, due to which its demand is increasingly growing.
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MRI of the orbits and optic nerves is considered a simple and generally safe procedure that does not require special measures to prepare for diagnosis. It is usually prescribed by an ophthalmologist during the patient’s appointment and examination, if the diagnosis accurate diagnosis causes him problems.
A person can undergo examination on the same day or later, when such an opportunity arises. The fact is that not all medical institutions are equipped with the necessary equipment. In addition, the MRI procedure will not be free for everyone.
The main condition for obtaining a high-quality image is the patient’s immobility during the examination, which the person is warned about in advance. If the patient is very nervous, he experiences symptoms of claustrophobia or severe pain that do not allow one to remain immobile, a technique is indicated sedatives, reducing nervous excitability.
Patients with mental disorders or serious eye injuries in which they experience unbearable pain, require additional fixation of the limbs. If the above measures do not help, the doctor may resort to anesthesia administered intravenously.
Since the examination of organs is carried out using a magnetic field, any metal objects that could distort it must be removed. We are talking about jewelry and clothing with metal elements (locks, buckles, buttons, buttons, decorative overlays, etc.). If there is metal in the body in the form of crowns, organ implants, electronic devices, supporting the functions of the body, you need to tell your doctor about it during your appointment. It may be necessary to clarify the material of dentures if the patient is not sure of his information.
During MRI, contrast agents can be used, which facilitate the diagnosis of tumor and inflammatory processes and help assess the condition blood vessels. This issue is also discussed in advance, because on the eve of the procedure (5 hours before it) the patient will have to refuse food so that no components from the food can affect the result of the study. The best option is to administer contrast on an empty stomach.
To exclude contrast agent intolerance and anaphylactic reactions, before administering the drug, a test is carried out by applying the drug to exposed skin in the wrist area. The doctor must check the patient’s weight, because the volume of contrast administered depends on this.
The drug is administered intravenously as injections or infusions (drips) into the elbow area. The patient may feel dizziness, fever, hot flashes, nausea, but this is not scary, since it is considered a normal reaction of the body to contrasts. The administration of drugs for MRI of the orbits with contrast is carried out under the supervision of a physician. The patient is monitored by medical staff for the next 30 minutes.
Half an hour after the administration of the drugs, active substance which accumulates in different tissues in different concentrations, you can begin MRI diagnostics. During this time, the medicine will spread through the bloodstream and reach the area under study.
MRI of the orbits, like any other diagnostic procedure, is not carried out for the sake of interest. Therefore, it must be taken seriously. After examining the patient by a specialist, he gives a referral for a diagnostic study. With this direction and the results of previous studies of the visual organs, the patient is sent to the diagnostic room.
The radiography we are used to is somewhat different from magnetic resonance imaging, although both studies are identical and pursue the same goals. An uninitiated person may be a little shocked by the device in the form of a long, voluminous pipe located horizontally. It is in this tube (capsule) that a magnetic field is created, which makes it possible to obtain on the screen an image of the organ under study in all its details.
To relieve stress and fear of the device and the procedure, the patient is explained how an MRI of the eye is done, what the procedure can show in each specific case, and what consequences this study has for the body.
The operating principle of open or closed magnetic resonance devices is based on recording the movement of hydrogen atoms saturating the body's tissues under the influence of a magnetic field. The illumination of different areas of the image depends on the number of gas molecules accumulated there.
The MRI procedure is quite complex to perform and requires the patient to remain motionless. This is easiest to do in a horizontal position, when the person is as relaxed as possible. For these purposes, the tomograph has a retractable table on which the patient is placed, fixing his head in a special device. If necessary, other parts of the body can be secured with belts.
Since only the head area is examined, the table is shifted so that only this area is inside the apparatus. The torso is outside the tomograph.
Before starting the procedure, patients are asked to use earplugs, since the device has a not very pleasant monotonous sound, which can cause anxiety and cause unwanted movements.
The procedure itself is considered quite lengthy compared to radiography. It takes from 20 to 40 minutes, during which the person must lie still. If contrast agents are used during the study, the procedure may take another twenty minutes.
During the examination, the doctor is usually located outside the diagnostic room, but the patient can contact him at any time via speakerphone if an attack of claustrophobia or any other problem occurs, for example, chest pain, shortness of breath, a feeling of lack of air, which happens during the procedure with contrast. In the same way, the doctor can give the necessary instructions to the patient.
To reduce nervous tension and calm the patient, it is allowed to invite relatives to the procedure. This is especially important if the diagnosis is performed on a child. After all, the MRI machine is universal, so it has large sizes and can be frightening for a young patient.
Magnetic resonance imaging (MRI) is considered one of the most safe procedures, because unlike computed tomography (CT) and radiography, there is no need to use harmful x-rays. The magnetic field in the tomograph does not harm the health of a person of any age or condition, so health problems are more likely indications for the study than contraindications to it.
The only absolute contraindication to MRI is the presence of ferromagnetic alloys and electronic devices (pacemakers, electronic middle ear implants, etc.) in the human body. The magnetic field can negatively affect the operation of the pacemaker, simulating the heart rhythm and cause malfunctions of electronic microscopic equipment implanted in the body.
As for metal implants made of ferromagnetic alloys and metal fragments stuck in the body (for example, after injuries), the danger of the influence of a strong magnetic field is that under its influence ferromagnetic materials can noticeably heat up, causing tissue burns, and move from place. Thus, the magnetic field can negatively affect ferromagnetic and large metal implants, Elizarov devices, ferromagnetic middle ear simulators, inner ear prostheses containing ferromagnetic elements, vascular clips made of ferromagnetic materials installed in the brain area.
Some metal implants (insulin pumps, nerve stimulators, valve prostheses, hemostatic clips, dentures, braces, endoprostheses, etc.) can be made from materials that have weak ferromagnetic properties. Such implants fall into the category of relative contraindications, but they must be reported to the doctor, indicating the materials from which the device is made. After all, even these devices may contain ferromagnetic elements, and the doctor must assess how dangerous the effect of a magnetic field on them will be.
As for dentures, most of them are made of titanium, a metal with weak ferromagnetic properties, i.e. the magnetic field during MRI is unlikely to cause a reaction from the metal. But titanium compounds (for example, titanium dioxide, used in tattoo inks) can react differently to a strong magnetic field, causing burns on the body.
In addition to non-ferromagnetic implants, relative contraindications include:
In these cases, the decision about the possibility of performing MRI of the orbits is made by the doctor, taking into account the possible negative influence. In some cases, it is more appropriate to postpone the procedure for the time necessary to normalize the patient’s condition.
If we are talking about MRI with contrast, the list of contraindications becomes longer, but it still requires introduction chemicals into the body, the reaction to which can be dangerous.
MRI with contrast is not performed:
Before undergoing an MRI procedure, for his own good, the patient is obliged to tell about any metal objects in his body, including fragments from wounds, tattoos and cosmetics used (or better yet, not to use cosmetics), remove all types of jewelry, watches, and clothes with metal elements.
MRI of the orbits and optic nerves is a diagnostic test that is prescribed for a specific purpose. The purpose of the study is to identify pathological processes in the tissues of the eye or evaluate the results of treatment if MRI is prescribed again.
MRI allows you to study in detail the shape and quality of development of the orbits, the location and shape of the eyeballs, the condition of the fundus, the structure and course of the optic nerve, and identify dystrophic changes in it and other abnormalities.
Using MRI of the orbits, you can evaluate the condition of the optic veins and muscles responsible for the movements of the eyeball (their location, the presence of seals and tumors), and the fatty tissue of the orbits.
MRI is used to detect damage to the retina, which is the inner lining of the eye. The fact is that retinal damage does not have to be associated with eye or head trauma. Some pathologies inner shell organ of vision is associated with various systemic diseases (diabetes mellitus, hypertension, pathologies of the kidneys and adrenal glands). Magnetic resonance imaging helps to identify pathologies such as retinal detachment, diabetic or hypertensive retinopathy, damage to the vessels that supply nutrition to the retina, dystrophy or degeneration of this part of the eyeball, tumor and inflammatory processes, retinal tear.
MRI of the orbits with contrast allows you to assess the condition of the vessels of the eye, their blood supply, the presence of blood clots and ruptures. With the help of contrast agents it is easier to recognize internal inflammation. But most often the technique is still used to identify tumors when cancer is suspected. Using MRI, you can not only detect a tumor in a certain area of the eye, but also evaluate its shape and size, the presence of metastases, the impact on nearby structures and the possibility of removal.
Any deviations in shape, size, and tissue density identified by MRI of the orbits provide the doctor with valuable information necessary to make a final diagnosis. Moreover, during diagnostic measures Some damage to the brain can be detected, which is also visible on the tomogram.
An example of an orbital MRI protocol might look like this:
Study type: primary (if the study is repeated, also indicate the date of the previous one, with which the results will be compared).
The eye sockets have regular development, a pyramidal shape with clear and even contours of the walls. No foci of destruction or compaction are observed.
The eyeballs are spherical in shape and symmetrically located relative to the eye sockets. Fabrics vitreous homogeneous, no changes in the MR signal are observed (this indicates in good condition organ, for example, in inflammatory processes the MR signal will be hyperintense, in tumors - isointense or hyperintense).
No thickening of the membranes of the eye is observed. They have smooth and clear contours.
The optic nerves are characterized by a regular course and clear contours without dystrophic changes or local thickenings.
Orbital structures: The muscles of the eyeball have the correct location, there are no thickenings on them. Fat fiber, ocular vessels and lacrimal glands without features. The grooves of the convexital surface of the brain are unchanged.
Visible brain structures: There is no displacement of the midline structures. Tanks brain base not deformed. Lateral ventricles have brains normal sizes and symmetrical arrangement. There are no areas of pathological density in the area of brain structures.
Other finds: No.
The MRI protocol (deciphering) described above suggests that no pathological changes not detected in human visual organs.
After receiving the image and research protocol (and you will have to wait about 30 minutes for them), the patient is sent to an appointment with an ophthalmologist, and sometimes a neurologist, to make a final diagnosis and prescribe the necessary treatment.
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MRI of the orbits is a non-invasive procedure, i.e. It is possible to examine the internal structures of the eye without opening the tissues. This is another advantage of the modern diagnostic method.
Under MRI guidance, additional diagnostic studies can be performed, for example, a biopsy if a malignant tumor is suspected. tumor process inside the eye. Yes, and a tumor can be easily detected at an early stage of its development with small sizes. This helps to make an ideal MRI with contrast.
The three-dimensional image allows you to assess the condition of the organ in all details, the only thing is that it is not possible to obtain a clear image of the walls of the orbits, but all other structures are determined with great accuracy and without the health hazard that exists when performing a CT scan. The safety of the magnetic resonance method allows its use in the diagnosis of ophthalmological and other diseases in children. True, the procedure is prescribed for children over 7 years old who are already able to remain motionless long time and comply with the doctor's requests.
The disadvantages of the method are considered to be high cost, relatively long duration of the procedure with the need to maintain a static position throughout the entire examination period (which is not as simple as it seems), the likelihood of violation heart rate And large number contraindications associated with metal and electronic implants.
However, safety for the body is more important than any money, and time is not an issue when it comes to accurate diagnosis and human health. Those categories of people who cannot pass MRI examination, may resort to other diagnostic methods (x-ray, slit lamp, biomicroscopy of the eye, etc.), so they will not be left without the help of doctors.
Complications during MRI of the orbits can only occur if contraindications to the procedure are ignored. And then in most cases they are limited to minor tissue burns or distortion of research results if the patient does not report a tattoo or implant. Usually those people who have devices installed that control the functioning of vital important organs and systems, do not forget about them and always inform you before the appointment diagnostic studies. But if the information was hidden intentionally, this is the responsibility of the patient himself, who was informed about the requirements for high-quality diagnostics even before the start of the procedure.
A modern diagnostic method - MRI of the eye - helps to identify complex pathologies of the eye organs. During a visual examination, the doctor can only examine outer part ocular analyzer, its internal sections are hidden under the bones of the orbit. Therefore, to diagnose pathologies affecting the eyes, one cannot do without magnetic resonance imaging.
Analysis of new medical methods The examination showed that MRI is gaining popularity, this is due to the information content of the technique. And what is equally important, with its safety, even for children. How does this work? The local action of a magnetic field causes resonance in tissues. Experts have determined acceptable resonance pulse values for each tissue structure. When abnormalities are visualized, pathology is suspected. MRI is used to detect eye diseases and visual impairment. The advantage of this method is that it can be used at any age; the tomograph boasts the fewest contraindications, with high accuracy of the result.
The method is absolutely painless. The patient is placed in the tomograph tunnel, where it is necessary to remain motionless for 30 to 40 minutes. Discomfort is observed only.
This method is indispensable in ophthalmology, as it helps to clarify the nature of pathological changes in the area of the eye orbits. There are a number of indications for magnetic resonance examination:
MRI helps to identify pathologies of any etiology, even if these are infectious and inflammatory processes, autoimmune or congenital defects in the structure of the eyes.
MRI of the eyes is prohibited if there is a pin in the tooth or metal crowns
Based on the indications, it is easy to determine which changes can be visualized when performing magnetic resonance imaging. Considering that the optic nerve is anatomically created from millions of sensory fibers, its examination is given special attention. A three-plane image of the eye is displayed on the screen to show its systemic structure. The integrity of structures is assessed - nerves, blood vessels, fatty tissue.
Damage can be seen eye muscles, which perform motor function eyeball. The images will visualize blood flow disturbances, this often happens with injuries, and tumor-like neoplasms will be visible.
MRI of the eye orbit makes it possible to examine part of the tissue between the wall of the orbit and the eye itself - the retrobulbar space.
First of all, the purpose of the examination is explained to the patient. It is important to know that you must remain still throughout the entire procedure. This is necessary to ensure that the image is as clear and informative as possible.
If an MRI of the eye orbits and optic nerves is performed, the doctor does a test for individual tolerance reagent. In this case, you should not eat food several hours before the procedure.
During the diagnostic period, you need to get rid of lenses if a person wears them constantly or periodically. The duration of the procedure is no more than an hour; if a contrast agent is introduced, the tomography may take 1-1.5 hours, it all depends on which area is being examined.
As with any other diagnostic method, when computer examination There are a number of contraindications to using a tomograph:
MRI of the optic nerve and the eye as a whole represents the most safe method diagnostics of ophthalmological pathologies:
Appointing resonance tomography, the doctor assesses the person’s condition, internal recovery potential, severity of pathology, etc. The speed of processing MRI results of the eye orbits and optic nerves depends on the workload of the office. Typically, results will be ready in 2-3 hours. The patient, turning to a radiologist, receives all scanned images with processing and conclusion.
Ophthalmologists prefer magnetic resonance imaging due to its effectiveness and safety. Having received all the necessary data after the examination, you need to go to a qualified doctor who will draw up an individual treatment program.
In almost any medical institution Where there is an MRI machine, you can undergo an eye examination. In the healthcare system, it is important to trust clinics with the latest equipment and experienced doctors. Very often diagnostic ophthalmological diseases carried out using angiographer:
