Health

What Is A Magnetic Resonance Imaging (mri) Scan? Why Do You Need It?

By Suborna Fermi 15 Oct, 2024 414

Introduction 

Magnetic resonance imaging scan is a technique that uses strong magnetic fields and radio waves to create detailed pictures of the organs, muscles and soft tissues within the body. Healthcare providers use magnetic resonance imaging scans to detect injuries, tumours, and certain heart problems. Opposed to other imaging tests, the MRI scan does not use radiation. This article explains how MRI scans work, and why doctors use them. 

What is an MRI scan? 

An MRI uses strong magnetic fields, radio waves, and a computer to create elaborate and cross-sectional images of the internal organs or structures. The scanner looks like a large tube and a table in the centre, which allows the patients to slide in. Also, an MRI scan is different from other imaging tests such as X-ray and CT scans, because it does not involve harmful radiation. 

The tube-shaped magnets produce strong magnetic fields that align the protons found in the water molecules of the tissues. The machine transmits radio waves that help produce 3D images of the internal structure. These images appear cross-sectional, which allows the doctors to view each layer of the tissue.  

Open MRI

Two scanners are used in an open MRI, one is located above the body and the other below. As the name implies, the machine is open on the sides and is ideal for those having claustrophobia. 

Closed MRI 

The closed MRI is similar to the traditional design of the MRI machine. It features an array of magnets that surround the whole body. Unlike an open MRI, the closed MRI is open on one side only. 

What is MRI with contrast? 

The healthcare expert often recommends MRI with contrast. In this procedure, a contrast agent also called “dye” intravenously. The contrast agent mainly consists of a metal, called gadolinium. The contrast agent is used to accelerate proton activity and produce clearer, more vivid pictures. 

Why do you need an MRI? 

MRI is not used to determine broken bones, as bones do not hold much water. Therefore, the radio waves and magnetic fields may not be able to produce clearer images. MRI is used to view internal organs or soft tissues, to help diagnose various health conditions. 

Doctors generally recommend an MRI to diagnose teh following conditions: 

  • Brain injury

  • Brain aneurysm

  • Pinched nerves

  • Eye or ear issues

  • Stroke 

  • Tumors

  • Multiple sclerosis   

  • Congenital heart disease

  • Inflammation of the heart

  • Soft tissue injuries 

  • Joint disease or injury 

How to prepare for an MRI scan? 

You are not required to do any special preparations for an MRI scan. You can eat or drink as usual before the scan. However, if you are going for an abdominal or pelvis MRI scan, you have to for 5 hours before the scan. 

Conclusion 

An MRI scan is helpful to diagnose soft tissue injuries, tumours or other diseases. This scan is painless and known to be the safest scan as it does not use radiation. Those who are claustrophobic will benefit greatly from an open MRI, which operates slightly differently from the traditional MRI scanners. If you have concerns regarding your MRI scan, talk with your doctor to understand which MRI scan is better for you.