Home » Health » What is an MRI or Magnetic Resonance Imaging scan?
MRI scan

What is an MRI or Magnetic Resonance Imaging scan?

An MRI (or magnetic resonance imaging) scan is a painless radiology technique that has the distinct advantage of avoiding any form of x-ray radiation exposure.

Check Also: 5 Things To Do Every Morning To Be Healthy

By using a strong magnetic field and pulses of radio waves to make images of structures inside the body, an MRI scan prevents a person from any exposure to X-Rays or any other damaging forms of radiation.

The MRI scanner itself is a tube surrounded by a giant circular magnet. A patient lies on a movable bed that is inserted into this magnet. Our body consists mainly of water, and water contains hydrogen atoms. Radio waves 10,000 to 30,000 times stronger than the magnetic field of the earth are then sent through the body. This affects the body’s hydrogen atoms, forcing the nuclei into a different position.

As the nuclei move back into place they send out radio waves of their own. The scanner picks up these signals and a computer turns them into a picture. This information is processed by a computer, and an MRI image is produced.

Using an MRI scanner, it is possible to make very detailed images of almost all the tissue in the body. The tissue that has the least hydrogen atoms (such as bones) turns out dark, while the tissue that has many hydrogen atoms (such as fatty tissue) looks much brighter.  It is even possible to gather data about the different types of tissues by changing the timing of the radiowave pulses.

MRI scans have been used since the beginning of the 1980s and may show problems that cannot be seen with other imaging methods. In many cases, Magnetic Resonance Imaging scans can give different information about structures in the body than can’t be seen with an X-ray, ultrasound, or computed tomography (CT) scans.

For some procedures, contrast agents, such as gadolinium, are used to increase the accuracy of the images.

MRI tests are usually done by Magnetic Resonance Imaging technologists. The images are usually interpreted by a radiologist, but some other types of qualified doctors can also interpret MRI scans

Source: Two Views

Check Also:

This is not a Paywall, but Newslex Point's journalism consumes a lot of time, hard-work and money. That's why we're kindly requesting our readers to support us in anyway they can, for as little as $1 or more, you can support us .

Please use the button below to contribute to Newslex Point, Inc. using a credit card or via PayPal.

Donate Button with Credit Cards

Comments

comments

Loading...

About frank mubiru

Posted by Mubiru Frank, senior news reporter & Editor

Leave a Reply

Your email address will not be published. Required fields are marked *

*

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Loading...
x

Check Also

nurses advised

Nurses Asked To Embrace Hands On Vocational Skills To Fight Poverty

Nurses have been advised to  embrace hands on vocational skills in a bid to fight ...