A 32-Channel Lattice Transmission Line Array for Parallel Transmit and Receive MRI at 7 Tesla

被引：82

作者：

Adriany, Gregor ^{[1
]}

Auerbach, Edward J. ^{[1
]}

Snyder, Carl J. ^{[1
]}

Gozubuyuk, Ark ^{[1
]}

Moeller, Steen ^{[1
]}

Ritter, Johannes ^{[1
]}

Van de Moortele, Pierre-Francois ^{[1
]}

Vaughan, Tommy ^{[1
]}

Ugurbil, Kamil ^{[1
]}

机构：

[1] Univ Minnesota, Sch Med, Dept Radiol, Ctr Magnet Resonance Res, Minneapolis, MN 55455 USA

来源：

MAGNETIC RESONANCE IN MEDICINE | 2010年 / 63卷 / 06期

基金：

美国国家科学基金会;

关键词：

RF coil design; transmit array; concentric coils; 7T; transmission line coils; high field; TO-NOISE RATIO; IMAGING PERFORMANCE; PHASED-ARRAY; STEADY-STATE; HUMAN BRAIN; FIELD; COIL; NMR; POWER;

D O I：

10.1002/mrm.22413

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Transmit and receive RF coil arrays have proven to be particularly beneficial for ultra-high-field MR. Transmit coil arrays enable such techniques as B(1)(+) shimming to substantially improve transmit B(1) homogeneity compared to conventional volume coil designs, and receive coil arrays offer enhanced parallel imaging performance and SNR. Concentric coil arrangements hold promise for developing transceiver arrays incorporating large numbers of coil elements. At magnetic field strengths of 7 tesla and higher where the Larmor frequencies of interest can exceed 300 MHz, the coil array design must also overcome the problem of the coil conductor length approaching the RF wavelength. In this study, a novel concentric arrangement of resonance elements built from capacitively-shortened half-wavelength transmission lines is presented. This approach was utilized to construct an array with whole-brain coverage using 16 transceiver elements and 16 receive-only elements, resulting in a coil with a total of 16 transmit and 32 receive channels. Magn Reson Med 63:1478-1485,2010. (C) 2010 Wiley-Liss, Inc.

引用

页码：1478 / 1485

页数：8

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