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M.R.I; Familiarity with the device, preparation steps and possible complications

Study guide

Magnetic resonance imaging (MRI) is a method of imaging using a strong magnet, radio waves, and a computer. The doctor uses MRI images to diagnose diseases of the chest, abdomen, and pelvis and to evaluate the effectiveness of treatment. What are the uses of ARI? چیست What are its benefits and side effects? How to prepare for it? Follow us to the end of the article to know the answers to these questions and to become more familiar with MRI.

What are the uses of MRI?

The doctor uses MRI to diagnose illness or injury and to evaluate the effect of treatment. MRI can be done on different parts of the body, especially on soft tissues and the nervous system.

MRI of the brain and spinal cord It can be used for such diagnoses:

  • Cancer;
  • stroke;
  • Brain damage;
  • Eye problems;
  • Spinal cord injury;
  • Inner ear problems;
  • Multiple sclerosis or MS;
  • Damage to blood vessels such as an aneurysm (bulge or weakness of a blood vessel in the brain).

Cardiovascular MRI It is useful to check the following:

  • Heart disease;
  • Blockage of blood vessels;
  • Damage from a heart attack;
  • Heart wall thickness and movement;
  • Heart valve size and function;
  • Heart structure problems;
  • Pericarditis (inflammation of the tissues around the heart);
  • Problems with the aorta (the body’s main artery).

MRI of bones and joints Shows these problems:

  • Joint damage;
  • Bone infections;
  • Cancers include tumors;
  • Arthritis or inflammation of the joints;
  • Disc problems in the spinal cord;
  • Neck and back pain with neurological symptoms.

From Chest MRI Used to check the following:

  • Breast implant rupture in women;
  • Tumor size and spread in patients;
  • The risk of breast cancer in people with a high risk;
  • Probability of cancer returning after surgery or chemotherapy.

MRI can also be used to check the health of other organs, including:

  • Liver;
  • Kidney;
  • Bladder;
  • Chest;
  • Spleen;
  • Pancreas;
  • prostate;
  • Lymph nodes;
  • Adrenal glands;
  • Uterus and ovaries;
  • Bile ducts.

What is FMRI?

A special type of MRI, called Functional MRI (fMRI), shows a map of brain activity. This test measures the blood flow to the brain during a specific activity and shows the areas involved or active in the brain. FMRE can diagnose brain problems such as the effects of stroke, Alzheimer’s or brain damage. It is also used to map the brain in people who need brain surgery for epilepsy or tumors. The doctor uses this test to advance the treatment.

MRI equipment and device

A typical MRI machine is a large tube that is open on both sides. The client lay on a moving bed that moves toward the tube and is held in place by a number of belts.

In the short tunnel system, the whole person does not enter the MRI machine and only the part of the body to be scanned enters the machine and the rest of the body is outside the machine.

Voting is open in all departments. This device is suitable for people with a fear of the dark or people who are overweight. Image quality in some types of open MRI is not as good as closed MRI.

Benefits and side effects of MRI

Benefits of AMR

  • The biliary system can be examined non-invasively without dye injection.
  • Imaging is non-invasive and does not expose you to radiation.
  • It is suitable for identifying abnormalities that are not shown in other tests.
  • Suitable for diagnosing a wide range of diseases such as cancer, cardiovascular disease and muscle and bone abnormalities.
  • Gadolinium used in MRIs is less sensitive than the iodine dyes used in CT scans or X-rays.
  • It implements soft tissues of the body such as the heart and liver, which are more suitable for accurate diagnosis of diseases than other methods, and therefore a valuable expression for early detection of diseases.

Complications of MRI

  • Pregnant women should not use MRI in the first trimester of pregnancy, except in special cases.
  • In case of pregnancy, you should not receive a contrasting color, although its negative effect on the fetus has not been proven.
  • It is best for mothers not to breastfeed their babies 24 to 48 hours after breastfeeding.
  • Contrast color is not a problem for most people, but it can cause allergies in some. You should not receive a contrast color if you have a history of contrast color allergies or severe kidney disease.

It is possible that some of the dye will remain inside the body and accumulate in the brain and other organs. Of course, its destructive effect is not clear. In some cases, people may have a reaction to the dye, including:

  • کهیر;
  • Headache;
  • nausea;
  • Itchy eyes;
  • Injection site pain.

Some people who have metal in their body should not have an MRI, for example:

  • Cochlear implantation;
  • Pacemaker or electroconvulsive therapy;
  • Special metal springs in blood vessels;
  • Some clamps used to treat cerebral aneurysms.

MRI preparation

MRI _ Preparation for MRI

It is best to find out why you did it before the MRI. You can ask your doctor these questions:

  • What are the complications of the test?
  • Why do I need an MRI?
  • Are the benefits of the test greater than the side effects?
  • How much do the test results affect the treatment process?
  • But is the best way to check the situation?

Talk to your doctor about these issues before having an MRI:

  • Recent surgeries;
  • Pregnancy or the possibility of pregnancy;
  • Food or drug allergies or asthma;
  • Diseases such as kidney or liver disease.

The MRI machine uses a magnetic field, so the metal should not be with you. Tell your doctor if you have any metal devices that could interfere with the testing process. These devices are:

  • Body press;
  • Pin or screw;
  • Insulin pump;
  • Cochlear implantation;
  • Drug pumps;
  • Joint or metal limb;
  • Artificial heart valve;
  • Pacemaker or electroconvulsive therapy;
  • Implanted nerve stimuli;
  • Metal parts such as bullets or fragments;
  • Fillings or other dental work.
Tell your doctor if you have tattoos on your body. Some tattoo inks contain metal.

On the day of the test, wear light, comfortable clothing that does not have metal clamps or straps. You may also need to take off your clothes and put on a hospital gown.

Set aside these items before entering the MRI room:

  • Key;
  • Coin;
  • the watch;
  • Glasses;
  • hearing aids;
  • Bra;
  • Wigs;
  • Mobile;
  • Artificial prostheses.

Foreign objects near or around the eye are very important because they can move or cause blindness due to the heat of the scan.

Except in special cases, you can take your medication as usual. Be sure to consult your doctor about this.

Tell your doctor if you are afraid of being indoors or are excited about this test. You may need to have an MRI outdoors or get a sedative to relax before the test.

What happens when I do an MRI?

An MRI scan takes about 20 to 90 minutes. Contrast color is injected before some shots. This color helps the doctor to see the structure inside the body well. Gadolinium dye is commonly used, which can cause a metallic taste in the mouth. Gadolinium is much less likely to be sensitive to iodine contrast. However, it should not be used in some conditions, such as severe kidney disease. Blood tests can be done to ensure normal kidney function.

The MRI machine creates a strong magnetic field inside the body. The computer takes messages from the MRI and uses them to take serial photos. Each image shows a thin section of the body.

You may hear a thumping sound during the test. This sound is due to the energy produced in the device for taking pictures. You can use the earpiece to reduce noise.

You may feel a contraction during the test due to MRI stimulation of the nerves inside the body. This is normal and not a cause for concern.

Most people do not feel pain during the test, but the imaging site may become a little warm. Tell your radiologist if this bothers you.

What to do after MRI?

After the MRI, you can go home and do your daily chores. If you used medication before the MRI, stay at the imaging center for a while to regain full consciousness and ask someone to take you home.

What is the interpretation of MRI?

The radiologist will read your MRI result and report it to your doctor. Based on this report, the doctor will determine the next step in the treatment.

  • Overweight people may not fit completely into the machine.
  • High quality images depend on your ability to stay still and hold your breath while shooting. In case of anxiety, confusion or severe pain, it may be difficult to stay still during the shooting.
  • Irregular heartbeat may affect image quality, as some imaging techniques depend on the electrical activity of the heart. Breathing and bowel movements can also interfere with imaging.
  • MRI may not always tell the difference between cancerous tissue and edema or edema.

MRI for children

MRI for children

Infants and children usually need sedation or anesthesia for MRI so that they do not move during the test. It depends on the age of the child, the development of his intelligence and the type of test.

A pediatric anesthesiologist should be present during the test. Sometimes, instead of anesthetizing a child, they introduce him or her to the device, the way it works, and the sounds, or use facilities to distract the child from watching a movie or something while testing.

What is the difference between MRI and CT scan?

Unlike X-rays or CT scans, MRI does not use beams. In this way, the radio waves align the hydrogen atoms that are naturally present in the body. This does not cause any chemical changes. When hydrogen atoms return to their previous state, they release different energies depending on the type of tissue they contain. The scanner takes this energy and creates an image based on the information.

MRIs usually show the difference between normal and normal tissue better than X-rays, CT scans, and ultrasounds.

You say

How familiar are you with the MRI machine? ‌ Have you ever used this imaging technique? ‌ If you wish, you can share your experience and opinion in the comments section, and if you liked this article, please Send to your friends through social networks.

Warning! This article is for educational purposes only and you need to consult your doctor or specialist to use it. more information






M.R.I; Familiarity with the device, preparation steps and possible complications

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