A geometrically adjustable 16-channel transmit/receive transmission line array for improved RF efficiency and parallel imaging performance at 7 Tesla

被引：172

作者：

Adriany, Gregor ^{[1
]}

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

Ritter, Johannes ^{[1
]}

Moeller, Steen ^{[1
]}

Auerbach, Edward J. ^{[1
]}

Akguen, Can ^{[1
]}

Snyder, Carl J. ^{[1
]}

Vaughan, Thomas ^{[1
]}

Ugurbill, Kamil ^{[1
,2
]}

机构：

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

[2] Max Planck Inst Biol Cybernet, D-72076 Tubingen, Germany

来源：

MAGNETIC RESONANCE IN MEDICINE | 2008年 / 59卷 / 03期

关键词：

RF coil design; 7T; transmit array coil; parallel imaging; high-field MRI; transmission line coil; flexible array coil;

D O I：

10.1002/mrm.21488

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：

A novel geometrically adjustable transceiver array system is presented. A key feature of the geometrically adjustable array was the introduction of decoupling capacitors that allow for automatic change in capacitance dependent on neighboring resonant element distance. The 16-element head array version of such an adjustable coil based on transmission line technology was compared to fixed geometry transmission line arrays (TLAs) of various sizes at 7T. The focus of this comparison was on parallel imaging performance, RF transmit efficiency, and signal-to-noise ratio (SNR). Significant gains in parallel imaging performance and SNR were observed for the new coil and attributed to its adjustability and to the design of the individual elements with a three-sided ground plane.

引用

页码：590 / 597

页数：8