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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2006
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46436103 |
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Table of Contents:
- Optimization of saddle coils for magnetic resonance imaging Edson Luiz Géa Vidoto Mateus José Martins Alberto Tannús Carlos Ernesto Garrido Salmon Física, Astronomía y Matemáticas Saddle coils Magnetic ressonance imaging In Nuclear Magnetic Resonance (NMR) experiments, besides the apparatus designed to acquire the NMRsignal, it is necessary to generate a radio frequency electromagnetic field using a device capable to transduceelectromagnetic power into a transverse magnetic field. We must generate this transverse homogeneous magneticfield inside the region of interest with minimum power consumption. Many configurations have beenproposed for this task, from coils to resonators. For low field intensity (<0.5 T) and small sample dimensions(<30 cm), the saddle coil configuration has been widely used. In this work we present a simplified methodfor calculating the magnetic field distribution in these coils considering the current density profile. We proposean optimized saddle configuration as a function of the dimensions of the region of interest, taking into accountthe uniformity and the sensitivity. In order to evaluate the magnetic field uniformity three quantities have beenanalyzed: Non-uniformity, peak-to-peak homogeneity and relative uniformity. Some experimental results arepresented to validate our calculation. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436103 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.1A Vol.36