http://www.cnr.it/ontology/cnr/individuo/prodotto/ID62868
Electromagnetic Method for Sample Induced Resistance Calculation of Magnetic Resonance Coils (Articolo in rivista)
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- Electromagnetic Method for Sample Induced Resistance Calculation of Magnetic Resonance Coils (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
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- Giovannetti G.; Viti V.; Hartwig V.; Liu Y.; Yu W.; Mittra R.; Landini L.; Benassi A. (literal)
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- In: International Journal of Biomedical Engineering and Technology, vol. 4 (1) pp. 18 - 28. Inderscience, 2010. (literal)
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- CNR-IFC, Pisa, Esaote Biomedica s.r.l., Pennsylvania State University, Università di Pisa (literal)
- Titolo
- Electromagnetic Method for Sample Induced Resistance Calculation of Magnetic Resonance Coils (literal)
- Abstract
- SNR calculation in Magnetic Resonance experiments requires the knowledge of biological sample resistance value. In dependence on system geometry, many authors studied sample-coil interaction by using quasi-static approach, with very simple coil geometry (circular or square) and homogeneous infinitely long cylinders, spheres or half-space as an approximation of the sample geometry. However, in real MR experiments, both shape and dimensions can be very different respect to these coil and sample models. Moreover, quasi-static method fails at high field MR imaging. In this paper we propose a theoretical algorithm for sample resistance estimation which use a numerical solver based on Finite-Difference Time-Domain method for simulating MR systems, without approximations in sample and coil geometries. Comparison with experimental data, performed on a home-built simple coil, demonstrated the great accuracy of the developed algorithm. The proposed method can be used as a tool to estimate sample resistance values for more complex geometries. (literal)
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