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자료유형
학술저널
저자정보
N. Félix-González (Technical University of Madrid) A. L. Urbano-Bojorge (Technical University of Madrid) C. Sánchez-L de Pablo (Technical University of Madrid) V. Ferro-Llanos (Technical University of Madrid) F. del Pozo-Guerrero (Technical University of Madrid) J. J. Serrano-Olmedo (Technical University of Madrid)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.19 No.2
발행연도
2014.6
수록면
155 - 160 (6page)

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초록· 키워드

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The heating produced by the absorption of radiofrequency (RF) has been considered a secondary undesirable effect during MRI procedures. In this work, we have measured the power absorbed by distilled water, glycerol and egg-albumin during NMR and non-NMR experiments. The samples are dielectric and examples of different biological materials. The samples were irradiated using the same RF pulse sequence, whilst the magnetic field strength was the variable to be changed in the experiments. The measurements show a smooth increase of the thermal power as the magnetic field grows due to the magnetoresistive effect in the copper antenna, a coil around the probe, which is directly heating the sample. However, in the cases when the magnetic field was the adequate for the NMR to take place, some anomalies in the expected thermal powers were observed: the thermal power was higher in the cases of water and glycerol, and lower in the case of albumin. An ANOVA test demonstrated that the observed differences between the measured power and the expected power are significant.

목차

1. Introduction
2. Materials and Methods
3. Results
4. Discussion
References

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UCI(KEPA) : I410-ECN-0101-2015-420-001709672