PMID: 9001149Feb 1, 1997Paper

Multiple tuning of birdcage resonators

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
S AmariP B Barker

Abstract

A theoretical framework is presented for designing birdcage resonators for MRI and MR spectroscopy. The analogy between the birdcage problem and the phonon problem in solid-state physics is used to achieve multiple tuning. Allowing that the capacitances in the columns of the cage assume unequal values, it is possible to achieve multiple tuning and simultaneously preserve the sinusoidal current distribution necessary to set a homogeneous magnetic field. Given the physical dimensions of the columns and branches of the cage as well as the desired resonant frequencies, the corresponding values of the capacitances can be calculated exactly. Closed-form expressions for the capacitances are given in terms of the mutual inductances and the desired resonant frequencies. A detailed analysis for a symmetrical low-pass birdcage is presented. The expressions for the resonant frequencies reduce to those given by other authors when only nearest-neighbor mutual inductances are included.

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Citations

Mar 18, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G X ShenK R Thulborn
Sep 26, 2015·NMR in Biomedicine·Graham C WigginsKarthik Lakshmanan
Nov 8, 2011·Magnetic Resonance Imaging·Chunsheng WangXiaoliang Zhang
Nov 15, 2011·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jürgen RuoffFritz Schick
Apr 15, 2016·Journal of Magnetic Resonance·Omar RutledgeXiaoliang Zhang
Sep 10, 1999·Journal of Magnetic Resonance·F D DotyC D Hauck
Apr 16, 2010·Physics in Medicine and Biology·Seunghoon HaL Tugan Muftuler
Jul 10, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G B MatsonT C Hill
Oct 27, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ryan BrownGraham C Wiggins

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