Principles of magnetic resonance imaging
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedad Mexicana de Física A.C.
2004
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| _version_ | 1876482429965828096 |
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| author | A. O. Rodríguez |
| author_facet | A. O. Rodríguez |
| contents | Principles of magnetic resonance imaging A. O. Rodríguez Física, Astronomía y Matemáticas ultra fast imaging pulse sequences Magnetic resonance imaging The concepts of magnetic resonance imaging are reviewed and its application to medical and biological systems is described. The magneticresonance phenomenon can be described by both classical and quantum mechanical approaches. Magnetic resonance imaging is based on thetechniques of nuclear magnetic resonance. The scanner first aligns the nuclear spins of hydrogen atoms in the patient and starts rotating themin a perfect concert. The nuclei emit maximum-strength electromagnetic waves at the start, but over time the rotating spins get out of synch,simply due to small differences in local magnetic fields. The unsynchronized spins cause the combined electromagnetic signal to decay with time, a phenomenon called relaxation. A slice is selected applying a gradient in a particular direction (X, Y or Z). Magnetic resonance signalsare then formed by means of the application of magnetic field gradients along three different directions. Finally, the signals are acquired and Fourier transformed to form a two-dimensional or three-dimensional image. Important parameters determining the image quality such assignal-to-noise ratio, contrast and resolution are discussed too. A review of the most widely utilised imaging techniques is given includingultra-fast sequences. 2004 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57062710 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.Re3 Vol.50 |
| format | Artículo científico |
| id | redalyc_57062710 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Principles of magnetic resonance imaging A. O. Rodríguez Física, Astronomía y Matemáticas ultra fast imaging pulse sequences Magnetic resonance imaging Principles of magnetic resonance imaging A. O. Rodríguez Física, Astronomía y Matemáticas ultra fast imaging pulse sequences Magnetic resonance imaging The concepts of magnetic resonance imaging are reviewed and its application to medical and biological systems is described. The magneticresonance phenomenon can be described by both classical and quantum mechanical approaches. Magnetic resonance imaging is based on thetechniques of nuclear magnetic resonance. The scanner first aligns the nuclear spins of hydrogen atoms in the patient and starts rotating themin a perfect concert. The nuclei emit maximum-strength electromagnetic waves at the start, but over time the rotating spins get out of synch,simply due to small differences in local magnetic fields. The unsynchronized spins cause the combined electromagnetic signal to decay with time, a phenomenon called relaxation. A slice is selected applying a gradient in a particular direction (X, Y or Z). Magnetic resonance signalsare then formed by means of the application of magnetic field gradients along three different directions. Finally, the signals are acquired and Fourier transformed to form a two-dimensional or three-dimensional image. Important parameters determining the image quality such assignal-to-noise ratio, contrast and resolution are discussed too. A review of the most widely utilised imaging techniques is given includingultra-fast sequences. 2004 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57062710 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.Re3 Vol.50 |
| title | Principles of magnetic resonance imaging |
| topic | Física, Astronomía y Matemáticas ultra fast imaging pulse sequences Magnetic resonance imaging |
| url | https://www.redalyc.org/articulo.oa?id=57062710 |