MAGNETIC RESONANCE IMAGING

-Magnetic resonance imaging (MRI), or Nuclear magnetic resonance imaging (NMRI), is primarily a medical imaging technique most commonly used in radiology to visualize the structure and function of the body. It provides detailed images of the body in any plane. MRI provides much greater contrast between the different soft tissues of the body than computed tomography (CT) does, making it especially useful in neurological (brain), musculoskeletal, cardiovascular, and oncological (cancer) imaging. Unlike CT, it uses no ionizing radiation, but uses a powerful magnetic field to align the nuclear magnetization of (usually) hydrogen atoms in water in the body. Radiofrequency fields are used to systematically alter the alignment of this magnetization, causing the hydrogen nuclei to produce a rotating magnetic field detectable by the scanner. This signal can be manipulated by additional magnetic fields to build up enough information to construct an image of the body.
MRI is a relatively new technology, which has been in use for little more than 30 years (compared with over 110 years for X-ray radiography). The first MR Image was published in 1973 and the first study performed on a human took place on July 3, 1977.
Magnetic resonance imaging was developed from knowledge gained in the study of nuclear magnetic resonance. In its early years the technique was referred to as nuclear magnetic resonance imaging (NMRI). However, as the word nuclear was associated in the public mind with ionizing radiation exposure it is generally now referred to simply as MRI. Scientists still use the term NMRI when discussing non-medical devices operating on the same principles. The term Magnetic Resonance Tomography (MRT) is also sometimes used. One of the contributors to modern MRI, Paul Lauterbur, originally named the technique zeugmatography, a Greek term meaning "that which is used for joining". The term referred to the interaction between the static, radiofrequency, and gradient magnetic fields necessary to create an image, but this term was not adopted.
-BY ED ZERATI
-http://www.zerati.com

Category:

Science & Technology

Tags:

• zerati
• votuporanga
• brazil
• magnetic
• resonanse
• imaging
• mri
• neurocirurgia
• neurosurgery
• disease
• medicina
• medicine
• brain
• ressonância
• magnética
• neurology
• neuroradiology
• radiology

[TheCrazy243]

There the fan inside when the spin goes super fast that cause a lot noises i guess.

[FOG2006]

What causes the MRI noise?

[MrGoblin60]

I'm having one of these this afternoon. I hope the cause of my symptoms is obvious from the image.

[TheWuzzyBunny]

I enjoyed my MRI scan, it was great to lay inside and daydream, i wouldn't mind doing it again (though i have no medical reason for doing o).about the last

They do forget to tell you about the last sequence though, the last scan where you get "massaged" by the MIR :p.

I woud like to see an MRI that's exposed so you can see inside it but i can't find any videos of it :(.

[slamdvw]

The only thing scary about an MRI is the price tag... kind of neat to see the internals of your own body.

[eazypeezy]

Can nerve damage be shown on an MRI scan?

[TheCrazy243]

Awesome video. But I think my MRI sound just like that sound I can't really remember what that sound like... I'm 14yrs old . I had MRI for my knee on April 1st and finally, I torn my acl and I have to get surgery..MRI make my memory loss haha I can't really remember they didn't put me sleep I was awake during MRI scanner it so noise like crazy I didn't move anything I was so nervous haha.

[aleksa16no]

@steve89z i have also done it, it was alot of tutore i feel like i couldent breath in there and that i was trapped... but next time i was there it wasnt scary at all, its just a little hole just like train tunnel. dont be scared people, its important to do it if u must. very important.

[blackfrigorist]

What a funny statement......NOTHING MOVES in a MRI except gas and electricity.....a little bit of air also:-p

[angel2rx]

is it true that if you get out of the machine before the MRI is done, it's bad for you. and if it is, WHY!