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Magnetic Resonance Imaging (MRI) And Medical Considerations

If you or your child need an MRI, that is, an MRI, you should know that the procedure is safe.

Many people will never need to have an MRI scan, and if you have a cochlear implant, there may be other diagnostic tools available to use. In fact, 85% of radiology professionals agree that they have an alternative diagnostic tool for those who cannot undergo magnetic resonance due to having a device or a magnet implant.

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Magnet removal for better head and neck MRI studies

If you must undergo an MRI scan of the head, the presence of the cochlear implant magnet will distort the MRI scan image of any power. Regardless of what brand of implant you have, for the MRI scans of the brain in general you need to remove the magnet.

You can remove and replace the implant magnet with a medical procedure if necessary. In the unlikely event that you or your child need repeated MRIs, there is an option without a magnet.

Neuroimaging: Role of MRI

Magnetic resonance imaging can produce not only morphological images but also functional ones and its range of indications is extended day by day, invading the terrain of other modalities (CT, angiography, PET, ultrasound, etc.). There are currently two techniques in MRI that are leading the research, functional magnetic resonance imaging (MRI).

Determining the merits of a given medical imaging test poses a complex and multidimensional problem. In fact, the merits of an examination may depend on the patient's age, sex, size and physical limits. It may also depend on the disorder and symptoms under review

Making good decisions about medical imaging is further complicated by the fact that imaging techniques are evolving rapidly and that some clinical cases and exams are difficult. Furthermore, understanding the rationale for prescribing practices for diagnostic imaging exams is further complicated by an increasing trend in the number of specialists (e.g. cardiologists, obstetricians, rheumatologists, neurologists and oncologists) who order diagnostic imaging tests and interpret images and, in some cases, run imaging laboratories.

The use of advanced diagnostic imaging is likely to continue to increase over the next decade due to the above factors. Other factors may also contribute to the continued growth in the use of advanced diagnostic imaging. For example, the increased use of CT may be due in part to the interest it has had as a screening tool, particularly for lung cancer in smokers and former smokers, heart disease and colon cancer.

Similarly, it is likely that PET/CT will play an increasingly important role, as new radioactive indicators will broaden the range of clinical disorders that it can diagnose. It remains to be seen whether this possible increase in use will result in an increase in the frequency of inappropriate use.

Diagnostic Imaging Of The Chest

Imaging includes X-ray, MRI, scintigraphy and ultrasound examinations.

There are no absolute contraindications for carrying out diagnostic procedures for non-invasive images except for MRI. The presence of metal objects inside the patient's eyes or brain precludes MRI.

The presence of a permanent pacemaker or internal defibrillator is a relative contraindication. In addition, gadolinium, when used as a contrast agent for MRI, increases the risk of systemic nephrogenic fibrosis in patients with chronic 4th or 5th stage kidney disease.

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X-Ray techniques

X-ray investigations used for chest imaging include chest X-ray, fluoroscopy, high resolution, and multilayer CT and angio-CT.

Chest X-ray

Chest x-ray examination and fluoroscopy are used to obtain images of the lungs and nearby anatomical structures. The chest radiograph provides images relating to internal and external structures in the chest and is very useful to identify any cardiac abnormalities, parenchymal lung, pleura, chest wall, diaphragm, mediastinal and lung ILI. Usually, it is the survey that is first done to study the lungs.

Computed tomography

CT displays the intrathoracic structures and abnormalities more clearly than a standard chest x-ray can. Conventional (planar) CT provides multiple images of cross-sections of the chest, 10 mm thick. Its main advantage is the wide availability. The disadvantages are represented by the movement artifacts and by the limited resolution in the volume of fabric included in a 10 mm slice.

The spiral CT provides multiplanar images of the entire thorax acquired during apnea of 8-10 seconds while the patient is being moved in a continuous manner in the gantry of the CT. Spiral CT is considered at least equivalent to conventional CT for most applications. Before having a CT scan, it is recommended to know the CT scan cost in south Delhi. Its main advantages are speed, less exposure to radiation and the possibility of reconstructing the images on the 3 floors. The software can also generate images of the bronchial mucosa (virtual bronchoscopy).

Magnetic resonance

MRI has a relatively limited role in lung imaging but is preferred over CT in specific circumstances (e.g., for the evaluation of neoplasms of the upper sulcus, possible cysts and indissociable lesions from the chest wall). In patients with suspicion of pulmonary embolism in whom IV contrast agents cannot be used, MRI can sometimes identify coarse proximal emboli, but normally its use is very limited in this pathology.

The advantages of MRI are the absence of radiation exposure for patients, the excellent visualization of vascular structures, the lack of bone artifacts and the excellent contrast of soft tissues.

Ultrasound

Ultrasound is often used to facilitate certain procedures such as thoracentesis and the insertion of central venous catheters. Ultrasound is also very useful for assessing the presence and extent of pleural effusions and is now commonly used to guide thoracentesis to the patient's bed. Ultrasound performed on the patient's bed is becoming common to diagnose pneumothorax.

The biopsy endobronchial ultrasound-guided is increasingly being used in combination with fiber optic bronchoscopy to better locate masses and enlarged lymph nodes. The diagnostic yield of endo-bronchial ultrasound compared to conventional unguided techniques is higher as regards the transbronchial aspiration of the lymph nodes.

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.

MRI Gains In Precision- A Big Plus For Neuroradiology

Medical MRIs generally use a magnetic field of 1.5 Tesla, but more and more establishments are equipped with 3 Tesla MRIs which allow an improvement of the image quality to visualize brain structures.

In recent years, MRI technology has greatly improved, which has allowed the introduction of magnets twice as powerful as those of the previous generation. An innovation that first benefited university hospitals, but is now spreading in many radiology centers. With regard to brain imaging, many diseases benefit from the improvement of the quality of 3 Tesla images, such as small malformations of the cortex in epilepsy, or micro-aneurysms of intracranial vessels.

Without additional risk

As a reminder, unlike the scanner, the MRI technique is not based on the use of radiation but on that of a magnetic field and radio waves. It relies on the property of the nucleus of hydrogen atoms to behave like a small magnetized top in certain conditions. Now, these atoms are present everywhere in our body: in water and in fats, in different quantities according to the tissues. When the protons are placed in a strong magnetic field- provided by the large tunnel-shaped magnet inside which the patient enters- they become magnetized.

Emitting electromagnetic waves of the same frequency excite the hydrogen nuclei and disturb the equilibrium state of the system: this is the resonance phenomenon. After each pulse, the protons restore the energy accumulated during their excitation by producing a signal, received by antennas. This signal closely depends on the water concentration of the surrounding molecules so that we can distinguish each tissue. Whatever the MRI test cost in Gurgaon, there are no contraindications or additional risk since the biological effects of a short exposure to a static magnetic field have been widely studied and no deleterious effects have been reported.

The gain of safety and comfort

MRI is often feared by patients as it can be painful to stay for almost an hour without moving in this narrow, hot, and noisy environment. They will be happy to learn that the exam time can be significantly reduced. It obviously depends on the indication, but a complete brain scan lasting 45 minutes can, for example, be reduced to 30 minutes. Regarding the tariff, it is not different from a 1.5 Tesla MRI since the TARMED grid does not differentiate magnetic field differences. Now, when a patient consults for a headache, a diagnosis with a 3 Tesla MRI will result in a much safer outcome. Especially since certain pathologies require a fast treatment at the risk of endangering the life of the patient.

Previously, patients were apprehensive about passing an MRI. The procedure took a long time, from three-quarters of an hour to one hour. Moreover, it was necessary to remain motionless in a narrow white tunnel. Few were happy at this prospect.

Fortunately, the deal was quick to change. Given the rapid growth of MRI applications, operators wanted to see the hardware and software evolve in order to improve the procedure, both in terms of speed and comfort. Recent years have seen the implementation of innovations that have accelerated the scanning speed or optimized comfort. The MRI has thus gained in efficiency and user-friendliness, for both patients and MRI scan centers in New Delhi.

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