Monday, December 20, 2010

Medical magnetism resonance is become picture


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Medical magnetism resonance is become picture


[Summary] the article showed medical picture sort and the contrast that become history of characteristic of the generation that resembles technology of characteristic, NMR, MRI and fundamental, MRI, MRI and MRI and CT.
[Key word] medical image; NMR; MRI technology, characteristic and history; CT is comparative

Medical MagneticresonanceImaging
[Abstract] This Paper Is To Confer About The Kinds Andcharacteristics Of Medical Imaging, MRI, the Origin And Thedevelopment Of MRI And Its History. And The Contrast Between MRIand CT.
[Key Words] Medical Imaging, NMR, MRI, the MRI Technology, itscharacteristics And History, the Development, contrast.
From 1895 German physicist roentgen (Withelm ConradRoentgen, 1845- - 1923) discover X is smooth and pat the first Mrs. Zhang Lunqin from this photograph of first X line fluoroscopy (if pursue) since, medical is video technology from do not have have, never perfect a function all ready, classification is careful, experienced 100 old development course. X line technology and equipment had very great progress and rise, in addition the picture quality with video medicine also is in as contemporary microelectronics and computer technology current medical science is video learn the wide application inside the domain 2 and got very big improvement.

One, medical image sort is divided roughly it is 4 kinds, they become severally be as follows like the characteristic:
(One)
CT:  of head of Guang scull  has Qian of ⒌ of  of the larva of a tapeworm or the cercaria of a schistosome to light Du of Bai Lu  to throw Qian of  of discharge stand upright with Du from bank of  of depend on of Hun of spoon scull 
(2) supersonic: Organize the reflex of different acoustic resistance that the interface is in

(3) nuclear medicine: Use an organization to differ to radiative tracer absorb ability, show its space distributinging case, use at showing flow of candy metabolization, blood, union gets case of metabolization of body, oxygen

(4) MRI: The relax comfort of nucleus is characteristic, reflect environment of condition of nucleus density, movement, physiology
Among them, magnetism resonance is become picture (MagneticResonanceImaging, MRI) it is current one of most advanced video examination methods, it is a video diagnostic technology that having traumatic sex burgeoningly to resemble is structure of human body interior, this one technology got swift and violent development in the time that does not come out, equipment production technology becomes better day by day with diagnostic theory. Current, MRI equipment (see a picture) in big in urban hospital already received wide application, the image that its differentiate high to organ of human body organization is clinical offerred more smooth human body is in-house structural picture news and information of more substantial significant diagnosis and treatment.
2, MR
MRI is to be based on MR (Nuclear MagneticResonance) phenomenal medicine is video technology.
NMR: Harmony bring a case to court of  of head of instrument of ≈ of cowardly of berth of τ imperial mandate is low show Nai to uncover Meng of Yong of ㄗ of move of stitch the sole to the upper of solid male of joyous ㄆ heart to protect   to call on  chasm Mu pats Xiang abb of  of ǎ of secondary stable of cabin of Ru   basks in  of  of  of Qu of delay of cabin Chi H small cup

This phenomenon was discovered at the same time 1946 by the E.M.Purcell of the F.Bloch of Standford and Harvard, because NMR is in physics and chemistry application,have great sense, they won Nobel physics award 1952.
3, MRI
Magnetism resonance is become picture (MagneticResonanceImaging, MRI) examination technology and image rebuild mathematical progress develops a kind of when rise new-style medical science with achievement video examination technology.
MRI is the medicine that is based on MR phenomenon video technology. It is the human body old and well-known family in traversing pair of static magnetic field the radio frequency of some kind of specific frequency (Radio Frequency, RF) pulse, the light proton in making human body is organized gets incentive and produce magnetism resonance phenomenon, after stopping RF proton pleaseds in relax the induction in the process gives MR signal; Through the reception to MR signal, space encode and image rebuild wait for processing process, produce MR picture namely. Nucleus of the hydrogen inside human body is rich, and undertake with it magnetism resonance becomes the result that resemble best, because this is current,MRI convention resembles with hydrogenous nucleus.
4, the history of MRI
1946-51
Discover NMR phenomenon, lay theory and experimental foundation
1951-60
Successive spectrum appearance, determine chemical material spectrum
1960-73
Appearance of FT-NMR pulse spectrum, measurable 13C chart
1971
Damadian (new York thirty establish an university) the T1 that discovers malign organization is lengthened

1973
Lauterbur(new York thirty establish an university) offer gradient field theory and obtain MR of the first conduit to resemble

1974-78 yearBritish Nuo Ding Han Nottingham and university Aberdeen of A Bai Ding develop MRI, obtained person skull to the head resembles and obtain abdomen resembling 78 years in May
1981-82
Clinical applying
1982MRI commercial GE, Piker, Siemens, Philips
1983-84
American FDA enters the market permissibly
5, MRI characteristic
Magnetism resonance is become from 20 centuries like equipment the birth at the beginning of 80 time arrives present 20 old in, no matter be the diagnosis to clinical disease or the research work to foundation and clinical medicine,all made enormous contribution. The characteristic of its image includes the following fields:
MRI nondestructive hurts a gender
MRI can offer systematism to learn parameter of environment of information, physiology
MRI has bright parenchyma contrast, multi-parameter to become picture
Without interference of skeletal bogus shadow, become in head, cadre system like excel CT
Groovy scanning is given priority to with position of axle, can choose arrowy shape and coronal shape
T1 resembles having good contrast to different parenchyma structure
T2 resembles be being used at showing pathological changes is organized
Need not use radiography agent to be able to demonstrate accent of hemal, heart
Can undertake diffusing to be become with perfusion resembling
6, the contrast of MRI and CT
7, the progress of MRI
In recent years, magnetic field of amiable high-powered gradient, open model the application of magnetic body, soft coil and computer network, the hardware development of MRI equipment is rapid, MRI is in the following 5 respects have very great progress:
1, EPI is MR is become shorten greatly like time.
2, magnetism resonance blood-vessel is become picture
3, FMRI technology
4, magnetism resonance intervenes into what resemble
5, the technique that eliminates bogus shadow

Anyhow, the development of MRI will be much azimuth, if MR is become resemble, the hardware of MRA, MRS, FMRI and RMT and software technology while development; Undeniable is, the ceaseless development of computer technology will more of the development that accelerates MRI technology and clinical application extend. 20 centuries end up to now since, IT and life science are two domains with global science the most active progress, MRI technology regards this as the child of both union, continue the development as the times and scientific progress Xiang Wei is watched and depth of functional examination domain develops, to announcing the mystery of life will produce mainer and mainer effect.

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