WHAT IS MRI?

An MRI is a test that takes photographs of the inside of your body using a machine with a powerful magnet. Changes in the magnetic field around your body are recorded by a computer. The adjustments are then used by the computer to generate a succession of detailed images.

Each image appears to be a cross-section of your body. A 3-D image of the inside of your body can likewise be created by the computer. An MRI, unlike CT and PET scans, does not employ x-rays (radiation).

  • A magnetic resonance imaging (MRI) scan does not use x-rays or radiation and is usually quite safe.
  • MRI scans are usually more detailed than CT scans, but they take much longer and are far more painful.
  • If you have certain types of metal things in your body, you won’t be able to get an MRI because it uses powerful magnets.
  • Because most MRI machines place you in a small tunnel, some people become frightened (claustrophobic) and are unable to complete the test.
  • Some MRI machines (known as “open MRI”) have a larger opening than doesn’t upset people as much.

WHY WOULD I NEED AN MRI?

When additional information is needed to identify and observe anything, doctors may use an MRI instead of a CT scan.

  • Brain, spinal cord, muscular, and liver disorders
  • Female reproductive organs issues
  • Hip and pelvic bone fractures
  • Tears or sprains in your joints are common problems.
  • Infection or bleeding
  • If a CT scan isn’t an option, doctors may opt for an MRI exam instead.
  • You’ve had an adverse reaction to the type of contrast agent used in CT scans (such as sneezing, dermatitis, or difficulty breathing).
  • You’re expecting a child (because CT scans give off radiation and MRI does not)

 

WHAT HAPPENS DURING AN MRI TEST?

Prior to the examination

You’ll empty your pockets and take off any jewellery, belts, or other metal items. You can usually keep your clothing on.

A liquid (called a paramagnetic contrast agent) is sometimes injected into a vein or joint. The MRI contrast agent enhances the visibility of particular portions of your body on the images.

If you’re nervous about being confined to an MRI scanner, your doctor may prescribe a sedative to help you relax.

2. During the examination

As it glides into a big scanner fashioned like a tube, you’ll lie still on a table.
Doctors may advise you to use headphones or earplugs to drown out the scanner’s loud pounding noises.
At times, your doctor may ask you to hold your breath.
A scan normally takes 20 to 60 minutes to complete.

Following the examination,

You are free to resume your normal activities.

WHAT ARE THE PROBLEMS WITH MRI TESTS?

  • CT scans are faster.

CT scans take less time than MRI scans. They’re not commonly utilised in emergencies where speedy findings are required, such as if you’ve suffered a catastrophic injury or have had a stroke.

  • Small, cramped quarters

The majority of MRI scanners are compact and enclosed. Even if you aren’t often terrified of enclosed surroundings, you may feel claustrophobic during the scan. Additionally, particularly huge people may not be able to fit through the scanner.

Some MRI scanners include a bigger tube with one side that is open (open MRI). However, the images are not as clear as those produced by ordinary scanners.

  • Magnetic-field-related issues

The magnetic field of an MRI may cause problems if you have certain types of metal objects inside your body. All metal things in your body will be asked about by the MRI technician. Some metals are safe, while others are not. The technicians have a comprehensive list of what is and are not safe for each MRI machine. MRI, on the other hand, is a difficulty for:

  1. The MRI can cause medical devices controlled by magnets to malfunction, such as a heart pacemaker, defibrillator, or cochlear implant.
  2. The MRI can cause medical devices with wires or other items that carry electricity to heat up and burn you.
  3. A magnet can draw metal, such as iron, and the MRI can cause this metal to move inside you.
  4. Some medical devices, such as popular dental implants, prosthetic hips, and rods used to straighten the spine, are safe for MRI scans.

  • Reactions to the contrast agent, if used

An MRI test is less likely than a CT scan to cause an adverse reaction to the dye used. However, you may experience headaches, dizziness, nausea, discomfort, or an off-putting taste in your mouth. Kidney damage is a rare complication. If you already have renal difficulties, you’re more likely to suffer from kidney damage.