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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.

How To Determine The Cause Of "Knee Pain"?

One of the most common complaints after outdoor activities is a pain in the knee joint. Its cause can be both sharp traumatic effects and prolonged static loads. If you are concerned about “knee pain”, then you need to consult a traumatologist, because in some cases joint pain can be a harbinger of serious pathology.

Diagnosis of the causes of "knee pain"

In the vast majority of cases, the damage is complex, and without visualization of damaged structures to identify problem areas can be problematic. For this, an MRI study is performed by MRI scan centre in New Delhi to study the anatomical structures of the joint and identify the cause of the pain.

In the knee joint are most often damaged:

  • Menisci (red markers)
  • Bags of the joint in the form of inflammation.
  • Ligaments:
  • Cruciform- front and back
  • Collateral
  • Own patellar ligament

When does it make sense to examine an MRI of the knee?

With each step, the knee joints experience a three-dimensional load of the weight of the whole organism. For a short period, the knee can withstand much more. Like no other joint, the knee provides mobility. Cartilage and meniscus absorb a heavy load, and the ligaments further stabilize the knee.

Often, problems with the knee joint occur in children and adolescents in connection with growth, since the individual elements of the knee joint must constantly adapt to each other.

The knee joint is already inherently subjected to a constant load, and the additional load (for example, during sports) causes damage to it. Excessive rotation often causes ligament rupture, especially the cruciate ligament. An overload can also lead to the rupture of the meniscus. These two diagnoses cannot be made by X-ray. This requires an MRI scan.

In addition, the knee joint refers to those joints that are the most susceptible to wear (arthrosis). An MRI scanner shows how worn the cartilage is. Determining the degree of wear is very important in developing a treatment plan.

What is this survey?

Using a strong magnetic field, the internal structures of the knee are visualized in the framework of magnetic resonance imaging. This allows MRI scan centres in east Delhi to make an accurate diagnosis.

If the artificial knee cannot be avoided, then MRI images are an important part in terms of preparing the patient for surgery. It is necessary to clearly determine the type and position of the artificial joint.

As part of the examination (examination lasts up to 20 minutes), you lie on a movable couch, which is sent to the tunnel. It is open front and back. Using a strong magnetic field, layered images of the knee are created to consider the smallest changes. Such changes cannot be detected using x-rays, and the examination is painless and takes place for the patient in a gentle manner.

If necessary, a contrast agent is introduced in order to better consider the individual parts of the knee joint and possible damage. The used contrast medium does not contain iodine and only in rare cases, causes side effects.

Breast MRI Scan: Purpose, Procedure, and Results

Thoracic magnetic resonance imaging (MRI) is a type of imaging test that uses magnets and radio waves to check for abnormalities in the mammary gland. MRI gives doctors the opportunity to see soft tissue in your body. Your doctor may ask you to get a breast MRI if they suspect that there is an abnormality in the chest.

Why Breast MRI is done?

Breast MRIs are used to examine your breast when other imaging tests are insufficient or inconclusive to screen for breast cancer in women at high risk of having the disease and to check the progression of breast cancer, as well as the effectiveness of its treatment. Your doctor may also order breast MRI if you have:

  • Dense breast tissue
  • Signs of breast cancer
  • Family history of breast cancer
  • Leaking or torn breast implant
  • Neoplasm in the chest
  • Precancerous changes in the breast

Breast MRIs are intended for use with mammography. While breast MRI scan centre in Noida can detect several abnormalities, there are some breast cancers that mammography can better visualize.

How is breast MRI performed?

An MRI machine includes a flat table that can slide in and out of the machine. A rounded, wheel, as the part where magnets and radio waves emit from imaging the chest. Before being scanned, you will change into hospital clothes and remove all jewelry and body piercings. If you use a contrast dye, a dropper will be inserted into your hand so that the dye can be injected into the blood.

In the MRI room, you will lie on your stomach on a soft table. There will be depression on the table where your breasts will rest. The technician will slide you into the car. The doctor will give you instructions on when to conduct more and when to hold your breath. The technician will be in a separate room will be watching and monitoring that collect images, and therefore, these instructions will be given through a microphone.

You won’t feel the car is running, but you can hear loud noises, such as slams or thuds, and possibly a humming noise. A technician can give you a plug. Testing can take up to an hour. After the images have been recorded, you can change and leave.

Breast MRI Results

A radiologist of MRI test lab in Delhi will examine your breast MRI, dictate your interpretation results, and give conclusions to your doctor, who will review them after receiving the results. Your doctor will discuss your results or schedule a follow-up appointment. MRI produces black and white images. Tumors and other abnormalities may occur as bright white spots. These are white spots where the contrast agent is collected due to increased cell activity.

If an MRI scan indicates that the mass may be malignant, your doctor will recommend a biopsy as a follow-up test. This involves surgical removal of a small sample of tissue from a suspicious lump. A biopsy will help the doctor find out if the bump is malignant or not.

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.

Magnetic Resonance In Children

Brain resonance is primarily used when a structural brain injury is suspected, that is, a problem that we can "photograph."

As in all the complementary tests, the information it offers is of no value if the context of symptoms and signs of the patient that the neurosurgeon will have obtained during the medical visit and with which he will develop a diagnostic hypothesis is not taken into account.

It is essential in the study of pathologies that occur with alterations in brain structure such as childhood cerebral palsy, malformations, or the consequences of trauma or infection, among others.

It is also used in the study of some types of epilepsy, to ensure that there is no underlying cause. And very rarely before a headache.

For the study of vascular diseases, tumours, neurodegenerative processes, and prior to brain surgery, the MRI images are combined with other special resonance techniques:

  • Spectroscopy:

Provides information on brain metabolism

  • Diffusion: study the microscopic molecular movement
  • Perfusion: allows to see cerebral blood flow
  • Angiography:

Visualize, after contrast injection, arteries, and veins

  • Tractography:

To see the structure of brain fibers

  • Functional MRI:

The image is obtained while the patient performs a task and their brain activity is studied

How is a resonance made?

Unlike other imaging techniques, such as simple radiology or CT, magnetic resonance imaging does not use radiation (X-rays), but rather very strong magnets and radio waves that have no side effects. This makes resonance, along with ultrasound, the safest and safest procedure to obtain body images.

The waves pass through the tissue to be studied, finding different resistance depending on the amount of water it contains. Thus, the device produces a very reliable and accurate map of the studied area much sharper than that obtained by other techniques.

The strong magnetic fields that are created during an MRI force to remove all metal objects from the room. Even smaller objects cause interference by vibrating under the force of the magnet, resulting in blurry images without utility, large objects can fly away, causing accidents. Before having an MRI, one should know the MRI test cost in Noida.

That is why the patient should take off his clothes and put on a hospital gown before laying him on the narrow stretcher that slides inside the resonance tube. To better visualize the images, contrast is sometimes given to the patient through an intravenous line. The most widely used is gadolinium, which is very safe and rarely causes side effects - nausea and local pain - and very rarely allergic reactions. It is contraindicated in patients with severe kidney problems.

The time required to obtain the images is very long, about 30 minutes minimum - depending on the surface to be studied, and the patient must be absolutely still so that they do not get blurred. In addition, the intense noise of the device prevents spontaneous sleep. Children under 6 years of age and children with difficulties to collaborate need to be sedated so that the MRI obtains clear images. Sedation will be done by MRI test labs in Delhi who will be present throughout the examination.

The Magnetic Resonance Imaging And Its Development

Although the lack of vocalization when speaking or partial paralysis can simply be signs of an attack or a migraine, they can also be symptoms of a stroke. Cerebral infarctions are the third leading cause of death in the United States and one of the leading causes of severe disability.

More than 3 million people who have survived a stroke have become unable to work or take care of themselves. For this reason, when a patient enters an emergency room with these symptoms, doctors must make a crucial diagnosis without losing a second. Although the number is still small, there are more and more hospitals that can perform ultrasound MRI of the patient's brain using a technique called functional magnetic resonance.

In just a few minutes, the scanner reveals not only if the patient has suffered a stroke but also which part of the brain is at risk. The urgency of this diagnosis should not be underestimated. As one neurologist once said, "Time is brain. The earlier the diagnosis is made and treatment begin, the greater the part of the brain that can be saved."

This tool for the diagnosis of cerebral infarctions represents the first important clinical application of functional magnetic resonance imaging. Since the early 1990s, functional magnetic resonance imaging has helped neurology researchers learn more about brain functioning, as it allows them to observe the changes that occur in the chemical composition of different areas, as well as changes that occur in the circulation of fluids in a matter of seconds or minutes. Functional magnetic resonance imaging can also be used to better understand the physiology of other organs.

Conventional magnetic resonance imaging by MRI test labs in Delhi which provides detailed images of the anatomical structure, also plays an essential role in observing other parts of the body. It allows to detect symptoms of arterial sclerosis in the heart, as well as herniated discs, broken cartilage and tumors in the spine, bones, and joints. In all these cases, magnetic resonance imaging is performed without the need for painful interventions.

The basic investigations that led to magnetic resonance and functional magnetic resonance began in a series of physics laboratories in the first decades of the 19th century. This article describes the path, often tortuous, that has been traveled during the last 70 years from the work of a series of scientists who simply investigated the nature of matter to current applications that ultimately save many lives.

The images of the human brain obtained by functional magnetic resonance represent the most recent advance in a field that was born just 20 years ago. Currently, scientists use functional magnetic resonance imaging to study the changes that occur in the brain activity of patients who have suffered a stroke and who begin to recover lost skills, with the aim of developing more effective treatments and therapies.

The functional magnetic resonance imaging allows investigating the development of the neural networks of the motor, visual, auditory, and speech systems of a baby when listening to the voice of his mother. MRI done by MRI scan center in New Delhi can also help to understand the subtle abnormalities in the activation of the brain in children with problems of lack of attention due to hyperactivity and memory problems of patients with schizophrenia.

Examination Of The Gastrointestinal Tract By MRI And CT

When examining the gastrointestinal tract and suspecting a serious illness, a computer (CT) or magnetic resonance imaging (MRI) scan is performed. Only these two types of examinations can give a full picture of violations in the digestive tract. With more common diseases, ulcers, bowel obstruction, polyps, CT is usually prescribed, which within 15 minutes will reveal all the disorders, including internal bleeding. MRI is prescribed by an MRI scan centres in Noida in more complex cases, with suspected neoplasms in the gastrointestinal tract or when other examination options do not give an exact answer in determining the disease.

Pay attention to your intestines with the following symptoms:

  • Black feces or blood feces (see a doctor immediately)
  • Often recurring pain in the abdomen or anus
  • Prolonged feeling of nausea
  • Prolonged constipation
  • Bloating
  • Frequent diarrhea

MRI is prescribed to the patient to obtain the final picture of the disease, as well as:

  • With suspected tumors
  • If the patient is pregnant

This is explained by the fact that in MRI, unlike CT, the patient is not exposed to aggressive radiation during the procedure. Therefore, CT is strictly contraindicated for pregnant women, and MRI is allowed from the third month. CT can also not be done more than once a year. CT is prescribed for suspected internal bleeding, and when there is a suspicion of a violation of the complete integrity of the intestines and stomach. Also, when there is a suspicion of acute bowel obstruction. With CT, the patient is exposed to radiation; with this, there are limitations in its use.

With CT, doctors can accurately determine the state of the gastrointestinal tissue and the violation of their integrity, determines wall defects, perforation of the stomach and intestines, and the state of sphincters.

MRI gives a picture of changes in cell metabolism and reveals significant pathologies, including malignant and benign tumors, cholelithiasis, and inflammatory processes in the pancreas.

It is not difficult to prepare these procedures:

  • Forget about vegetables, fruits, grain bread and other products containing coarse fiber per day
  • 8 hours before the examination, stop any meal
  • An hour before the procedure, take 5-6 tablets of activated carbon, if there are no contraindications.

WHAT TO CHOOSE: CT OR MRI?

When choosing between CT and MRI, it is necessary to take into account the features of each type of examination and recommendations of MRI scan centers in east Delhi. When making a decision, the following factors should be considered:

The clinical picture. If you suspect diseases such as an ulcer, polyp, other disorders in the structure of the intestinal wall or obstruction, they often turn to computed tomography. This examination allows you to detect internal bleeding, which helps to save the patient's life. Due to the fact that the study takes no more than 10-15 minutes, the diagnosis of an injury to the gastrointestinal tract and the appointment of the necessary treatment is fast enough.

Suspicion of oncology. MRI of the gastrointestinal tract allows you to get an accurate diagnosis regarding cancer. Finding a tumor, especially in the pancreas, is quite difficult, especially in acute inflammation. This method provides an accurate diagnosis of such pathology and makes it possible to prescribe effective therapy.

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.

Back Pain And Shortness Of Breath: Finding Out The Causes

Having back pain and trouble breathing can be particularly concerning, especially if you’re unsure about the cause. The back pain coupled with shortness of breath undoubtedly puts a person under a lot of discomforts. Hence, the persistent problem must go through some diagnosis in the MRI test as well as consulting to the doctor. The reason for back pain can be many. Let us find out each of them which compound the problem of back pain and shortness of breath.

  1. Intercostal muscle strain- Few people are aware of the intercostals muscles, a muscle formation which runs between adjacent ribs and play an important role in expanding and contracting the rib cage when breathing. If one or more of these muscles are strained along the back, the symptoms can range from a mild tenderness or stiffness to intense, sharp back pain. Thus can also result in breathing difficulties due to expansion and contraction of rib cage.

An intercostal muscle can be strained in various ways, such as:

  • Overuse/overexertion- A common reason for any muscle group to get a strain is overuse of the same. The intercostal muscle is no different. Some activities rowing can cause a muscle to overstretch and develop small tears. A sudden or awkward movement can also strain a muscle.
  • Direct trauma- This refers to the direct impact on the ribs due to collision or a fall. The injury or the direct trauma directly impacts the ribs and connecting muscles could injure one or more of the intercostal muscles.

An intercostal muscle strain typically starts to ease within a few days. The average time for fully recovery takes 6 to 8 weeks. The initial level of pain which may be severe can be relieved with ice, heat packs, or over-the-counter pain medications

2. Severe kyphosis- A healthy thoracic spine (upper back) is slightly curved forward, which is called a kyphotic curve or kyphosis. However, if the thoracic spine is curved at least 50 degrees, it is considered hyperkyphosis, also commonly referred to as kyphosis

Besides the aforementioned major reasons for back pain, the MRI scan center in Delhi has also listed reasons that can cause shortness of breath due to severe back pain. These are:

  • Scoliosis- The abnormal sideways twisting and rotation of the spine, called scoliosis. Though it is rare but this abnormal movement can become severe enough to affect breathing. Sometimes both scoliosis and kyphosis are present together.
  • Allergic reactions- Medicines are very likely to put people at risk of developing an allergic reaction to some medications for back pain, such as muscle relaxants. Several troubling signs and symptom could indicate an allergic reaction to back pain medication, such as difficulty breathing, chest tightness, swelling in the throat (or arms or legs), etc.

Every unexplainable pain that goes to the excruciating levels must be referred to the physicians who can guide in the subsequent process of diagnosis. A well plan and routine therapy can undoubtedly ease the problem of shortness of breath due to back pain.

What Are The Various Applications Of MRI Testing?

Medical resonance imaging or MRI is a common examination that allows you to explore the inside of the body with precision. Compared to conventional radiology, MRI allows to perfectly visualize most abnormalities, malformations or tumors present in a tissue. The images have quality much higher than radiography called "banal", but this quality of images still remains lower than that of the scanner. We will use MRI for organs or tissues that have more water, which will allow a more accurate diagnosis, especially between infections or tumors. It can be differentiated thanks to the different shades offered by the MRI done by MRI Scan Centre.

1. Breast MRI.

In recent years, breast cancer screening has been favored thanks to MRI. Indeed, this being sensitive, it obtains results very favorable to "this exercise". According to an American researcher, MRI may even be superior to mammography when screening for breast abnormalities. The MRI can also tell if the abnormality needs to be treated or not.

2. Brain MRI

MRI is mainly used to detect abnormalities in the blood vessels in the brain, but also to detect abnormalities in the brain itself. MRI allows different sections (transverse, longitudinal or oblique) to be made. Whenever possible, try not to inject contrast medium. Gadolinium (contrast medium) is exclusively used for MRI because it is injected by "intravenous". The detection of malformation of the brain structure, or abnormalities of its contour are in most cases detected. The advantage is that it allows in addition to detect its origin, as well as its nature (vascular, degenerative, tumoral, inflammatory, or infectious).

3. Bone or ligament MRI

When MRI is used for this type of "problem", it can be noted that it is often for back problems (vertebrae) that patients come for an MRI. Experts have told us that these patients made up two-thirds of the bone or ligament MRI.

4. Hepatic MRI

The main studies of this MRI are the anatomy, as well as the vascularization of certain organs, more particularly the liver, subject to abnormalities such as cancer, angiomas (malformation of the vascular system of the liver), or the adenoma (tumor benign (non-cancerous) due to the proliferation of a normal glandular tissue). A contrast product is specifically dedicated to the liver, ferrite because it is iron-based.

5. MRI in the future.

Derivatives have emerged such as MRI, which is functional magnetic resonance imaging. This new technique allows the study of the specific functions of the brain that intervene in the execution of these different tasks (taste, smell, and reading, listening). This replaces more and more PET: positron emission tomography (positive electrons) which uses radioactive tracers to detect cognitive activity (the intrinsic intellectual activity of the brain). Unlike PET, which can only be used once on the same patient (because of positron irradiation), MRI can be done several times because the marker is blood oxygenation which is a natural phenomenon of the body and that there is no radiation emitted on the patient.

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