### Abstract

The combined field integral equation (CFIE) method is used to calculate the RF magnetic B_{1} field produced by a transmission-line resonator element for high-field magnetic resonance systems. The method calculates the surface currents on a homogeneous phantom with triangular patches with the RaoWiltonGlisson (RWG) basis functions, and the tetrahedra with the SchaubertWiltonGlisson (SWG) basis functions are used to calculate the resonator element field. The transmission-line resonator element is excited at its resonant frequency and the equivalent surface current distribution over the phantom are obtained, and then the internal fields in the phantom are calculated for the 9.4-T MRI system. This integral equation method provides much faster B_{1} field results than the corresponding inite-difference time domain (FDTD) approach. A field localization method by adjusting phase excitations is also discussed.

Original language | English |
---|---|

Article number | 5782928 |

Pages (from-to) | 592-595 |

Number of pages | 4 |

Journal | IEEE Antennas and Wireless Propagation Letters |

Volume | 10 |

DOIs | |

State | Published - 2011 Jul 5 |

### Fingerprint

### Keywords

- Combined field integral equation (CFIE)
- magnetic resonance imaging (MRI)
- method of moments (MoM)
- radio frequency (RF) B field
- radio frequency coil
- transmission-line element

### Cite this

_{1}field calculation with transmission-line resonator analysis for high-field magnetic resonance systems.

*IEEE Antennas and Wireless Propagation Letters*,

*10*, 592-595. [5782928]. https://doi.org/10.1109/LAWP.2011.2158286

}

_{1}field calculation with transmission-line resonator analysis for high-field magnetic resonance systems',

*IEEE Antennas and Wireless Propagation Letters*, vol. 10, 5782928, pp. 592-595. https://doi.org/10.1109/LAWP.2011.2158286

**RF B _{1} field calculation with transmission-line resonator analysis for high-field magnetic resonance systems.** / Yoo, Hyoungsuk; Vaughan, J. Thomas; Gopinath, Anand.

Research output: Contribution to journal › Article

TY - JOUR

T1 - RF B1 field calculation with transmission-line resonator analysis for high-field magnetic resonance systems

AU - Yoo, Hyoungsuk

AU - Vaughan, J. Thomas

AU - Gopinath, Anand

PY - 2011/7/5

Y1 - 2011/7/5

N2 - The combined field integral equation (CFIE) method is used to calculate the RF magnetic B1 field produced by a transmission-line resonator element for high-field magnetic resonance systems. The method calculates the surface currents on a homogeneous phantom with triangular patches with the RaoWiltonGlisson (RWG) basis functions, and the tetrahedra with the SchaubertWiltonGlisson (SWG) basis functions are used to calculate the resonator element field. The transmission-line resonator element is excited at its resonant frequency and the equivalent surface current distribution over the phantom are obtained, and then the internal fields in the phantom are calculated for the 9.4-T MRI system. This integral equation method provides much faster B1 field results than the corresponding inite-difference time domain (FDTD) approach. A field localization method by adjusting phase excitations is also discussed.

AB - The combined field integral equation (CFIE) method is used to calculate the RF magnetic B1 field produced by a transmission-line resonator element for high-field magnetic resonance systems. The method calculates the surface currents on a homogeneous phantom with triangular patches with the RaoWiltonGlisson (RWG) basis functions, and the tetrahedra with the SchaubertWiltonGlisson (SWG) basis functions are used to calculate the resonator element field. The transmission-line resonator element is excited at its resonant frequency and the equivalent surface current distribution over the phantom are obtained, and then the internal fields in the phantom are calculated for the 9.4-T MRI system. This integral equation method provides much faster B1 field results than the corresponding inite-difference time domain (FDTD) approach. A field localization method by adjusting phase excitations is also discussed.

KW - Combined field integral equation (CFIE)

KW - magnetic resonance imaging (MRI)

KW - method of moments (MoM)

KW - radio frequency (RF) B field

KW - radio frequency coil

KW - transmission-line element

UR - http://www.scopus.com/inward/record.url?scp=79959804949&partnerID=8YFLogxK

U2 - 10.1109/LAWP.2011.2158286

DO - 10.1109/LAWP.2011.2158286

M3 - Article

AN - SCOPUS:79959804949

VL - 10

SP - 592

EP - 595

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

SN - 1536-1225

M1 - 5782928

ER -

_{1}field calculation with transmission-line resonator analysis for high-field magnetic resonance systems. IEEE Antennas and Wireless Propagation Letters. 2011 Jul 5;10:592-595. 5782928. https://doi.org/10.1109/LAWP.2011.2158286