MAGNETIC RESONANCE IMAGING
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- Опубліковано 26 вер 2024
- -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 DR. ZERATI
- / edzerati
really useful to explain the patient abt mri thnx
The magnets force your atoms to spin at a different rate, just as the magnetic field passes over them, then when they return to their normal state, after the field passes, they produce a signal and the computers pick this signal up and produce an image. Like sonar in a way.
very nice!!!!
so have I, Laura. good luck, I hope everything will be fine :)
The only thing scary about an MRI is the price tag... kind of neat to see the internals of your own body.
Came here for the dance track at the end ^^
It's very interesting this video, but you love yourself a lot.
very interesting video, i think the process is pretty amazing!
most mri scanners look like a big doughnut lol
I think i need also go to magnetic brain resonance. Because few months ago i could not read.
i had a MRI scan yesterday and was very interessting...anyway at me have injected too after 10 minutes a contrast liquido in the bloodstream
this is happening to me on friday.
I'm having one of these this afternoon. I hope the cause of my symptoms is obvious from the image.
@steve89z MRIs can be extremely helpful. you shouldn't be telling people not to get one just because you didn't like it.
Can MS be diagnosed with a MRI without contrast?
Can nerve damage be shown on an MRI scan?
So this is what MRI stands for!
There the fan inside when the spin goes super fast that cause a lot noises i guess.
@TheCrazy243 its caused by the magnetic force being generated
الله يشفي الجميع
I bet the only reason you hate it, is cause it's very loud.
i had this done and it's torture don't do it
Had one today it was a breeze!!
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.