Performance of a petal resonator surface (PERES) coil via equivalent circuit simulation
MRI coil parameters can be estimated via simulation using an equivalent RLC circuit to investigate coil performance. The Spice Opussimulator was used to simulate the loss return coefficients of a circular-shaped coil and a petal resonator surface (PERES) coil via equivalent(RLC) circuit. Simulated c...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | México |
| Institución: | Universidad Autónoma Metropolitana |
| Repositorio: | Redalyc-UAM |
| OAI Identifier: | oai:redalyc.org:57065302 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57065302 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas RLC RF coil simulation quality factor resonator coil |
| Sumario: | MRI coil parameters can be estimated via simulation using an equivalent RLC circuit to investigate coil performance. The Spice Opussimulator was used to simulate the loss return coefficients of a circular-shaped coil and a petal resonator surface (PERES) coil via equivalent(RLC) circuit. Simulated coefficient spectra were obtained and compared with experimentally-acquired spectra generated by both coils.From these spectra, resonant modes and quality factors of both coil prototypes were computed at 64 MHz and compared. Impedance andresonant frequency of the 8 petal-PERES coil design were computed and compared against those obtained with the circuit simulation. PEREScoil design produced an impedance value of 54 , and an experimental resonant frequency differing by less than 1% from that predictedby the circuit simulator. The quality factor of the coil prototype differs by only 8% from that obtained with the simulation method. Due toconstruction imperfections in the coil design, it showed a drop of 8.84 dB in attenuation compared with the simulation results obtained withthe aid of an equivalent circuit. This scheme may serve as an alternative to the trial-and-error method usually used to develop dedicated RFcoils for magnetic resonance imaging |
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