منابع مشابه
Nuclear Magnetic Resonance Imaging
Hydrogen is present (IbundanLly in biological tis~uc. Protons posse~s two fundamental physical properlie~, (i) spin (L) LInd (ii) a small magnetic movement ( 11). Therefore the ,Homic nuclei or hydrogcn behave like tiny spi nn ing magnets. Our eart h is al~o (l n examplt: of such a magnet ic spinning top. When they a re placed in a sIalic magnetic Ilcld (Fig. I), the nudcl align themselves para...
متن کاملNuclear magnetic resonance imaging
This review covers the progress in the field of NMR imaging (NMRI), NMR microimaging, NMR microscopy or MR (micro) tomography as well as MRI (Magnetic Resonance Imaging) over a period from June 2005 to may 2006 and is a continuation of the report from last year. The word ‘‘MRI’’ was used mostly in the medical or clinical field, but recently many authors in non-medical field uses ‘‘MRI’’ instead...
متن کاملNuclear magnetic resonance medical imaging.
Nuclear magnetic resonance medical imaging is a new diagnostic tool available to radiologist for investigating the morphology and pathophysiology of the human body. In the presence of constant, stable, and uniform magnetic field and the application of radiofrequency radiation, will enable to produce anatomic cross sections. The physical principles of nuclear magnetic resonance medical imaging a...
متن کاملNuclear magnetic resonance imaging (MRI).
This article discusses the basic concepts of Magnetic Resonance Imaging (MRI) with the intention to introduce the subject to uninitiated. The MRI technique is a powerful noninvasive probe of the body's internal anatomy. In MRI, the images are produced not by X-rays, but through the use of non-ionizing radiowaves that stimulate transitions between spin states of nuclei in a magnetic field when p...
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ژورنال
عنوان ژورنال: BMJ
سال: 1987
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.295.6594.390-a