Magnetic Resonance Imaging (MRI)

MRI may sound complicated, but the science behind it is simple:

• Our bodies are mostly made up of water, which contains hydrogen atoms.
• The MRI machine uses a strong magnet to line up these atoms.
• Then it sends radio waves into the body, causing the atoms to produce signals.
• A computer reads these signals and turns them into detailed pictures of your body.

Because of this unique technology, MRI can show soft tissues like muscles, nerves, the brain, and organs very clearly—something an X-ray cannot do.

There are different types of MRI scans. The type recommended by your doctor depends on your health condition, the part of your body being examined, and your comfort level.

Open MRI

It is designed to provide more comfort, especially for people who feel anxious or claustrophobic.

Structure: Two flat magnets placed above and below the body with open space on the sides.

• Advantages:
  
  • Reduces the feeling of being “trapped” inside a tunnel.
  • Easier for children, elderly, or larger-bodied patients.
  • Allows better visibility for patients who may need assistance during the scan.
• Limitations:
  
  • Images are slightly less sharp than closed MRI.
  • May not be suitable for scans requiring very high-resolution imaging.
• Comfort measures:
  
  • Mild sedatives can be provided if anxiety is high.
  • Staff stays in communication during the scan.

Closed MRI

It is a traditional, tunnel-shaped scanner where you lie on a table that slides into the machine.

Structure: Magnets form a ring around your body for precise imaging.

• Advantages:
  • Produces the clearest and most detailed images.
  • Best choice for brain, spine, joints, and small organ scans where accuracy is critical.
• Limitations:
  • Narrow space may cause claustrophobia or anxiety in some patients.
• Comfort measures:
  
  • Earplugs or headphones are provided to reduce machine noise.
  • Staff communicates through an intercom to reassure and guide you.
  • Mild sedatives can be offered if necessary.

MRI with Contrast

This is used when your doctors need enhanced images for better diagnosis.

Procedure: Contrast dye (usually gadolinium) is injected through an IV line in your hand or arm.

• How it works:
  • Gadolinium changes how water molecules respond to the MRI, making certain areas stand out more clearly.
• Benefits: Helps doctors detect:
  • Tumors or abnormal growths
  • Infection or inflammation
  • Blood vessels and blood supply to organs
  • Subtle tissue changes not visible on a standard MRI
• Safety:
  • Contrast is generally safe; most people tolerate it well.
  • Mild side effects can include headache, nausea, or a warm sensation at the injection site.
  • Severe reactions are very rare.
  • Kidney function and allergies are checked before the procedure to ensure safety.

 MRI scans are recommended for various reasons. Some of the most common reasons are: 

• Brain and Nerves: To check for stroke, brain tumours, multiple sclerosis, or chronic headaches.
• Spine: To look at slipped discs, spinal cord injuries, or nerve compression.
• Bones and Joints: To detect ligament tears, cartilage damage, or arthritis.
• Heart and Blood Vessels: To assess heart disease, blocked arteries, or congenital problems.
• Abdomen and Pelvis: To study liver, kidneys, uterus, ovaries, prostate, or other organs.
• Cancer Detection: MRI helps detect tumors and assess whether cancer has spread.

Preparing for an MRI is simple, but there are a few things you need to keep in mind, such as:

• Clothing: Wear comfortable clothes without zippers or metallic buttons. In most cases, you may be asked to change into a hospital gown.
• Remove Metal Items: Before the scan, remove jewelry, watches, belts, hairpins, coins, and even your phone. The magnet in the MRI is very strong and can pull metal objects.
• Inform Your Doctor: Tell your doctor if you have:
  
  • Pacemaker, heart stent, or cochlear implant
  • Metal pins, plates, or screws in your body
  • Any past surgeries involving metal implants
• Food & Drink: For most MRI scans, you can eat and drink as usual. If you need contrast, you may be asked not to eat for a few hours.
• Claustrophobia or Anxiety: If you feel nervous about lying inside the machine, let your doctor know. A mild sedative can be given to help you relax.

Here’s a step-by-step guide to help you understand clearly what happens during the MRI procedure:

1. Arrival: When you arrive at CK Birla Hospitals, Jaipur, our medical practitioners will assist you with the process. They may ask you to remove any metal items.
2. Changing Clothes: You may need to wear a hospital gown.
3. Positioning: You will lie down on a table that slides into the MRI machine.
4. Contrast Injection (if needed): If your test requires contrast dye, it will be given through an IV line.

During the Scan:

• The machine will make loud knocking or thumping sounds. You’ll be given earplugs or headphones.
• It is very important to lie still so the pictures are clear.
• You can communicate with the technician through a microphone inside the machine.
• The test usually takes 30 to 60 minutes, depending on the part of the body being scanned.

After the Scan

If no sedatives were used, you can go home right after. If you were given sedation, you will rest until you feel fully awake.

MRI is generally considered very safe. Unlike X-rays and CT scans, it does not use radiation. However, there are a few important safety points to know:

• Magnetic Safety: People with pacemakers, certain implants, or metal fragments in the body may not be able to have an MRI.
• Contrast Dye: Rarely, some people may develop an allergic reaction. Patients with severe kidney problems should avoid contrast.
• Claustrophobia: Some people may feel anxious inside the closed machine. Open MRI or sedation can help.
• Noise: The machine is loud, but ear protection is always provided.

Aftercare:

• Most patients can return to normal activities right after the scan.
• Drink water if you had contrast; it helps flush it out of your system.

Your doctor will receive the MRI report from the radiologist and then explain the results to you.