You have no items in your shopping cart.
Show Location
×

THE TEST JUST ADDED TO YOUR BASKET


CONTINUE ADD MORE GO TO CART
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.

MRI- An Imaging Study To Diagnose The Diseases

Magnetic resonance imaging is a modern method for studying the structure, condition, and function of internal organs. It is based on the measurement of electromagnetic waves emanating from body tissues. These signals are transmitted to a computer, which decodes them and converts them into an image. The obtained data is analyzed and evaluated by a specialist conducting an MRI.

Modern equipment allows obtaining a three-dimensional image of the internal organs so that the study has high information content. MRI helps to identify a large number of diseases that are not so accurately diagnosed using other methods.

MRI has great advantages over invasive and radiographic methods, as it is a safe and comfortable procedure. Due to this, the study is used in the diagnosis of diseases of many organs and systems:

  • Brain;
  • Vessels of the neck and brain;
  • Jaw and temporomandibular joint;
  • Joints;
  • Spinal cord;
  • Spine;
  • Abdominal organs;
  • Pelvic organs;
  • Respiratory system;
  • Endocrine system;
  • Lymphatic system;
  • Reproductive system.

One of the most common areas of magnetic resonance imaging in the diagnosis of diseases of the nervous system. MRI of the brain allows detecting tumors and determining the stage of their development, diagnosing problems with vessels, multiple sclerosis, and other pathologies.

Many patients are interested in - with MRI of the brain, radiation occurs, and is it dangerous? What dose of radiation does the body receive during the research? Is MRI Hazardous to Health?

MRI Radiation Level

Unlike X-rays and computed tomography (CT), patients receive a zero dose of radiation during an MRI scan, since this study is not based on ionizing radiation, but on electromagnetic effects.

The effect of a magnetic resonance imager is comparable to that of a cell phone or microwave. MRI done by MRI test labs in Delhi does not cause irregularities in the structure, condition, and function of tissues and organs, being at the same time a highly accurate diagnostic method.

Therefore, you can be sure that there is no radiation during an MRI scan of the brain.

Magnetic resonance imaging in oncopathology?

Patients with oncologic MRI are prescribed with the use of a contrast agent - to increase the information content of the study: this allows a detailed study of the tumor and its vascular network. Due to the high precision and diagnosis, the most effective treatment is prescribed.

The absence of irradiation provides the possibility of using MRI for cancer patients with confirmed diagnoses of various malignant tumors, which are not recommended for X-ray methods. X-ray and computed tomography due to ionizing radiation harm the tissues of the body: cause changes in DNA and adversely affect the already existing pathological processes. Electromagnetic effects during MRI are safe for both tumors and healthy tissues and organs.

How often can I do magnetic resonance imaging?

In the absence of contraindications, MRI may be prescribed - depending on the disease and the characteristics of its course - as often as necessary to develop an effective treatment plan or to correct it. Since the procedure is safe for the body, it can be carried out with a minimum time interval.

The frequency of an MRI can only be determined by a doctor. If there is an urgent need or in accordance with the developed plan of dynamic observation, the study is carried out several times in one day.

Is It Possible To Do CT And MRI For Children?

Imagine that a doctor prescribes your child to undergo a computed tomography or magnetic resonance imaging. Most likely, you are, first of all, thinking about the possible risks: will this or that research harm the children's organism? How will the child take them?

Is there a danger?

Magnetic resonance imaging (MRI) is an absolutely safe method of research, since it does not use ionizing radiation sources. There is no reason to worry about the hypothetical harm to the child from this type of diagnosis. When conducting computed tomography (CT), X-rays are used, so the concerns of the parents are well founded. But in the medical organizations of the Moscow Department of Health, special pediatric research protocols are used, which allow reducing the radiation dose to the minimum harmless values. Therefore, this procedure does not have any negative impact.

Is it possible to replace a CT scan with a safer MRI?

MRI and CT are two different methods of radiation diagnosis, which are not always interchangeable. They give different information about the state of health, so the question of what kind of research to conduct a child is decided directly by the attending physician or radiologist. The greatest harm to health is caused not by a microdose of X-rays, but by insufficient diagnostics.

Is it necessary to give children anesthesia during CT and MRI?

During CT and especially MRI, it is very important that the child remains stationary throughout the procedure; otherwise, the results will not be accurate or not suitable for analysis. The MRI procedure takes an average of 20-30 minutes, which means that the child will have to lie motionless all this time. As practice shows, children 5-6 years and older do an excellent job with this task. But earlier patients are difficult to maintain immobility.

For children under 3 years old, CT and MRI are performed only in a hospital, under the supervision of specialists. Before the study, the child is given a sedative or mild inhalation anesthesia, after which he wakes up quickly and easily.

CT and MRI with contrast enhancement

To diagnose some diseases, a child may need to have a CT scan or MRI with a so-called contrast - and you should not be afraid of this study. Before the procedure, the doctor will carefully collect anamnesis and find out all about possible contraindications. For greater safety, a study with contrast enhancement in children is carried out only in hospitals.

Where will my child be taken for CT and MRI?

According to the order of the Moscow Department of Health, the routing of children on CT and MRI in hospitals is carried out in accordance with the assignment by the district. That is, depending on the CT scan centre in which you are monitored, you will be assigned a referral to one or another institution.

In most cases, children under 3 years old are sent to inpatient medical organizations for CT and MRI. This is due to the need to introduce anesthesia for the success of the study. Children over 4 years old can undergo an outpatient study.

Why is Magnetic Resonance so Noisy?

In past years, magnetic resonance imaging (MRI diagnostic labs in Delhi) has become 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 machine basically consists of a powerful magnet, mostly superconductors, with a transmitter and a radio wave receiver, in addition to all the electronics necessary 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 signal emitted 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 a 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 RM signal and coding it in order to create the image.

What is so much acoustic noise? To create the magnetic field an electric current has to be applied and when this is applied in the presence of a static magnetic field they produce variable magnetic forces that act on the gradient coil (mechanical vibration) and cause it to expand and contract rapidly in a matter of milliseconds producing movements or vibrations generating noise that is manifested throughout the room, so we can say that the main responsible for the noise generated by the magnetic resonance machine 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 reduction of the thickness of cut, the field of vision (FOV), RT (repetition time) and ET (echo time) but this may affect the resulting image.

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

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

When the patient asks about technical issues like this we cannot use a very technical language since the patient would not understand us, we have to find a way to make ourselves understood in order to satisfy their curiosity. A patient informed about the MRI test cost in Noida that is going to be performed tends to collaborate and feel safer.

Show Footer