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MRI Of The Brain (Magnetic Resonance Imaging)

MRI is a modern study of brain structures by recording an RF signal when a patient is placed in a device with a high magnetic field, which allows doctors to conduct a high-quality diagnosis of brain diseases/ injuries. Unlike other methods of radiation diagnostics, such as computed tomography, radiography, during MRI we get more diagnostic information, the accuracy of which is now the highest among all methods of radiation diagnostics of brain structures. In addition, with an MRI of the brain, the patient is not exposed to ionizing radiation; therefore, this procedure is safer for health than other diagnostic methods.

BASIC INDICATIONS FOR MRI OF THE BRAIN

Diseases of the vascular system of the brain. In most cases, patients are referred for MRI test in east Delhi if the person has suffered a stroke or if there has been a hemorrhage in the brain. In this case, you can accurately see the affected area and understand how severe the hemorrhage was in order to use certain drugs to improve the patient's condition.

Endured various head injuries, especially those accompanied by neurological disorders, such as malfunctioning of the senses.

Oncological processes of the brain (primary tumors, secondary changes - metastases). In this case, MRI allows you to monitor the situation and see how much the tumor has increased or decreased after treatment.

Infectious diseases that occur with damage to the nervous system, such as meningitis, encephalitis, brain abscess, which, if improperly treated or absent, can lead to death.

Congenital anomalies of the substance of the brain for a long time may not produce significant symptoms, but under certain conditions (increased blood pressure, trauma, etc.), cause complications ending in temporary disability or disability.

Epilepsy, a condition accompanied by a malfunction of the cerebral cortex, in this situation it is necessary to see which part of the brain is damaged and what is its general condition.

Where to do an MRI of the brain

MRI- the gold standard for brain research, is the most accurate, safe and informative method of radiation diagnostics, both for assessing the anatomical structure of the brain and for visualizing pathological changes in its structure, and some specific studies can evaluate brain metabolism, but at the same time it requires the availability of modern expensive equipment in a medical institution, as well as highly qualified specialists who can make the correct diagnosis h based on studies.

Brain MRI is a painless procedure, as a result of which, using the influence of a magnetic field, and layered, detailed images of brain structures are obtained. MRI is a safe method of examination, i.e., when scanning, X-ray (ionizing) radiation is not used, and the patient is not "irradiated" during the procedure, as a result of several examinations it is possible to go through at a time. It is good to know the MRI test cost in Noida before undergoing the treatment.

If necessary, MRI of the brain is performed with contrast. A contrast agent is used to study processes in the organ or tissue under study in more detail. When injected into a vein, the blood flow brings a contrast medium to the zone of interest, after which a targeted study of this zone is performed, this allows you to identify and confirm the presence, as well as evaluate the dynamics of oncological and inflammatory processes in the brain.

Why Is MRI Scan So Noisy?

Magnetic resonance imaging (MRI) has become in recent years one of the most requested tests within a diagnostic imaging service thanks to its great potential to differentiate the different tissues that make up the human body, but why is it so noisy. It is the question that many patients ask themselves at the end of the test.

The Magnetic Resonance imaging machine is basically composed of a powerful magnet, mostly superconductors, with a transmitter and a radio wave receiver, in addition to all the electronics needed to coordinate its operation. The magnet creates a powerful magnetic field even more powerful than that of the earth, the transmitter, in turn, emits radio waves that are directed towards the patient, these waves excite the protons of the different tissues and the receiver picks up the emitted signal with which will create the image.

There are four magnets, one main, the largest and most powerful, and the other three smaller ones are the gradients, which are inside a large metal coil called the gradient coil. This coil is composed of copper electromagnets that create a secondary magnetic field in each of the three directions of space and fulfill a fundamental function since they are responsible for spatially locating the Magnetic Resonance signal and encoding it to create the image that is performed by MRI scan centre in East Delhi.

Why so much acoustic noise? To generate the magnetic field an electric current has to be applied and when it is applied in the presence of a static magnetic field they produce variable magnetic forces that act on the gradient coil (mechanical vibration) and causes it to expand and contract rapidly in a matter of milliseconds producing movements or vibrations generating the noise that is manifested throughout the room, so we can say that the main reason the noise generated by the RM machine present in the MRI test labs in Delhi are the gradient coils.

There are other factors that contribute to generate noise such as the modification of acquisition parameters, acoustic noise tends to improve with the decrease of the thickness of cut, the field of vision (FOV), TR (repetition time) and TE ( echo time) but this may affect the resulting image.

On the other hand, the characteristics of the acoustic noise have a spatial dependence depending on the position and the size of the patient the levels can vary in about 10dB.

Studies conducted including a variety of pulse sequences where several gradients are applied resulted in this type of sequence (3D and GR) being among the strongest with levels ranging from 103 - 113 dB. Other studies also measured the acoustic noise generated by the echo-planar (EPI) and the FSE (fast spin-echo) sequences in 1.5T, noise levels ranging from 114 to 115 dB and at 3T levels in the range of 126 to 131 dB for these noise levels the use of hearing protection is recommended.

General Electric GE developed a technology called Silent Scan a few years ago that allows to reduce acoustic noise to a level similar to that of ambient sound, if we take into account that an RM scanner without this technology generates a noise of approximately 100 dB, depending on several factors, this decrease of almost 30 dB causes greater patient satisfaction and generates a more pleasant silent and comfortable experience.

MRI For Children: Diagnosis Without Fear

Magnetic resonance imaging has long established itself as a reliable diagnostic method that can identify pathology at an early stage of development. But despite the assurances of the doctors that the procedure is completely safe, many are still distrustful of this type of diagnosis. And especially when it comes to examining a child.

The first and main question: is an MRI scan safe for children?

The tomography itself does not carry any danger to humans. It works without the formation of any harmful radiation, unlike x-rays or computed tomography. Diagnosis is based on the influence of a powerful magnetic field and radio frequency waves on a specific area of ​​the body. I emphasize: it is harmless to both an adult and a child. And we get high-precision images in any plane, visualizing anatomical sections. These images allow you to most accurately diagnose and determine the treatment strategy.

At what age is MRI test in east Delhi prescribed for children? And what can be identified using such a diagnosis?

- Numerous studies have proven the complete harmlessness of MRI, suggest that the procedure can be prescribed even to new-borns. Moreover, with the help of a tomography, we can even conduct an examination of the foetus, which is still in the womb, to exclude developmental abnormalities. But this is done only according to the testimony of doctors and only in the last trimester of pregnancy. For babies up to a year, MRI is prescribed to identify congenital pathologies or if there is a suspicion of developing an infectious disease that can cause complications, including to the central nervous system.

There are situations when new-borns have cerebral haemorrhages or ischemia, when the brain receives insufficient nutrition. It is difficult to do without MRI if it is a suspicion of oncological processes: unfortunately, no adults are safe from them, no children. All these conditions require different treatment, but they have one thing in common: in such cases, an urgent and reliable diagnosis is needed. The sooner we figure out what’s the matter, the sooner we can help the child.

How is the procedure going and are there any differences between MRI for children and adults?

- At first glance, there are no global differences in MRI for an adult and a child. The bottom line is one: a person is located on the table of the tomography, the apparatus is configured depending on the area being studied and the patient’s parameters.

The procedure lasts from 20 minutes to an hour. After processing the results by a computer, the doctor receives a reliable image of certain organs in the form of layered images. Nevertheless, the MR diagnosis of the child has its own nuances. Any childhood age has features that need to be considered.

A newborn, a five-year-old baby, a teenager - they require a different approach to the examination. Firstly, the MRI device is set up in a certain way; the corresponding programs are selected. Secondly, depending on age approaches to preparing a child for the procedure also change. During the examination, the patient is required to be completely still - otherwise, we will not get clear pictures.

And if it is quite possible to explain this to a teenager, then with kids under 5 years old a completely different story. They do not understand what is happening, they can’t lie still, and they are scared of equipment and doctors. To know the MRI scan price in Delhi, you will have to consult the MRI labs. There is only one way out - to have an MRI under anaesthesia.

Can Brain MRI Detect Epilepsy?

To determine a disease such as epilepsy, MRI is much more effective than computed tomography. MRI uses x-rays, which are considered harmless to the body. Brain tissue may be subject to morphological changes; it is precisely magnetic resonance imaging that can determine them. Epileptic seizures in adults occur due to a brain tumor. The cause of the onset and development of the disease can be injuries, infectious diseases, chronic and acute intoxications.

Causes of the disease and the role of MRI in its diagnosis

In the process of diagnosis using MRI, you can determine the appearance of the main focus of the disease. The appearance of the focus primarily concerns a chronic disease. Magnetic resonance imaging allows you to determine the causes of seizures, to determine the size of the foci and their number, to determine the development of the disease for a certain period.

How is an examination using a tomograph for epilepsy?

Before you start diagnosing with MRI test in east Delhi, you must follow certain rules. Try to conduct an examination at the first sign of a disease. The sooner you spend them, the better. The patient must remove all metal objects. The scanning process takes no more than an hour. In order to prevent a seizure during scanning, it is necessary to exclude the occurrence of stressful situations; the patient should be as stable as possible. It is forbidden to conduct a scan if there are stimulants and implants in the patient's body. Tomography in heart failure is also undesirable.

Contrast method

A special contrast agent is used to implement this method. Gadolinium solution is administered intravenously with constant medical supervision. Gadolinium is a light gray metal used as a component in the production of phosphors. It is absolutely safe for humans. After use, it is excreted from the body in a natural way.

Thus, for a successful MRI diagnosis, it is necessary:

Competent, compiled by an epileptologist physician, referral to an MR study. In most cases, based on the clinical picture and EEG results, the neurologist-epileptologist can make an assumption about the nature and localization of the pathological process and should reflect this in the direction.

A modern MRI scanner with a sufficient magnetic induction power of at least 1.5 T and the ability to conduct research with a minimum slice thickness.

A qualified doctor of radiation diagnostics, having training in neurology, well knowing the specifics of the functioning of the nervous system and applying, if necessary, additional methods of data collection that go beyond the scope of the usual protocol.

The absence of a proper dialogue between neurologists-epileptologists and MRI scan centers in New Delhi, as well as, often, insufficient qualifications of both of them, explains a large number of negative results in MRI diagnostics of epilepsy. At the same time, global trends in the development of epileptology indicate a constant decrease in the number of cryptogenic (with undetermined causal) epilepsies and an increase in the number of symptomatic that is, developing secondarily against the background of structural and morphological changes in the brain.

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