Active shielding of cylindrical saddle-shaped coils: Application to wire-wound RF coils for very low field NMR and MRI

被引：37

作者：

Bidinosti, CP ^{[1
]}

Kravchuk, IS ^{[1
]}

Hayden, ME ^{[1
]}

机构：

[1] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

来源：

JOURNAL OF MAGNETIC RESONANCE | 2005年 / 177卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

saddle-shaped coils; transmit and receive coils; active shielding; low frequency magnetic fields; low field magnetic resonance;

D O I：

10.1016/j.jmr.2005.07.003

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We provide an exact expression for the magnetic field produced by cylindrical saddle-shaped coils and their ideal shield currents in the low-frequency limit. The stream function associated with the shield surface current is also determined. The results of the analysis are useful for the design of actively shielded radio-frequency (RF) coils. Examples pertinent to very low field nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) are presented and discussed. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：31 / 43

页数：13