2009
DOI: 10.1590/s0103-84782009005000041
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Imagem por ressonância magnética: princípios básicos

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Cited by 18 publications
(28 citation statements)
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References 9 publications
(16 reference statements)
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“…This makes the nuclei of many atoms in the body including hydrogen, are aligned with the magnetic field and then an RF signal is applied. The energy released from the patient‘s body is detected and used to construct computer image ,. Contrast agents are used to increase the contrast of the image ,…”
Section: Introductionmentioning
confidence: 99%
“…This makes the nuclei of many atoms in the body including hydrogen, are aligned with the magnetic field and then an RF signal is applied. The energy released from the patient‘s body is detected and used to construct computer image ,. Contrast agents are used to increase the contrast of the image ,…”
Section: Introductionmentioning
confidence: 99%
“…O contraste nas imagens se baseia na diferença de intensidade do sinal em áreas de estruturas ou de composição diferentes. A capacidade de obtenção de imagens multiplanares e a ausência de radiação ionizante tornaram a ressonância magnética a técnica de geração de imagens mais adequada para muitas doenças, em especial as do sistema nervoso central (SNC) por causa do seu abundante conteúdo hídrico, portanto, rico em prótons de hidrogênio, responsáveis pelo sinal gerado durante a obtenção de imagens (Lufkin 1999, Hilário et al 2000, Amaral et al 2003, Mullins 2006, Hage & Iwasaki 2009.…”
Section: Introductionunclassified
“…Outros fatores importantes a serem consolidados para quem almeja interagir com essa metodologia de imagem, são a compreensão da formação da imagem e o conhecimento da anatomia da cabeça em cortes seccionais. Recentemente foi publicada uma revisão da literatura sobre os princípios básicos dessa modalidade de imagem de uma forma assimilável para não físicos (Hage & Iwasaki 2009).…”
Section: Introductionunclassified
“…The nuclear magnetic resonance phenomenon, discovered in 40's, [1][2][3] describes magnetic properties of nuclei that in the presence of an external magnetic field, tend to align to it. When excited, applying radio waves, those nuclei are moved from the equilibrium.…”
Section: Introductionmentioning
confidence: 99%
“…Then, returning to their equilibrium state, they oscillate also emitting radio frequency that induces an eletromotriz force in a perpendicular coil to the main field. 1,3,4 This signal is then acquired and processed, and the information about the nuclei and their environment can be extracted. The magnetic resonance technique main advantage is the fact that it is noninvasive and does not produce any harmful radiation over the object of study.…”
Section: Introductionmentioning
confidence: 99%