磁共振成像中用于正交线圈的一种新的去耦方法。

A new decoupling method for quadrature coils in magnetic resonance imaging.

作者信息

Hui H T, Li B K, Crozier S

机构信息

School of Information Technology and Electrical Engineering, University of Queensland, Brisbane QLD 4072, Australia.

出版信息

IEEE Trans Biomed Eng. 2006 Oct;53(10):2114-6. doi: 10.1109/TBME.2006.881783.

DOI:10.1109/TBME.2006.881783

PMID:17019876

Abstract

A powerful decoupling method is introduced to obtain decoupled signal voltages from quadrature coils in magnetic resonance imaging (MRI). The new method uses the knowledge of the position of the signal source in MRI, the active slice, to define a new mutual impedance which accurately quantifies the coupling voltages and enables them to be removed almost completely. Results show that by using the new decoupling method, the percentage errors in the decoupled voltages are of the order of 10(-7) % and isolations between two coils are more than 170 dB.

摘要

引入了一种强大的解耦方法，以从磁共振成像（MRI）中的正交线圈获取解耦信号电压。新方法利用MRI中信号源位置（即有效切片）的知识来定义一种新的互阻抗，该互阻抗能精确量化耦合电压，并几乎能将其完全消除。结果表明，通过使用新的解耦方法，解耦电压中的百分比误差约为10^(-7) %，且两个线圈之间的隔离度超过170 dB。