一种用于磁共振成像中射频线圈设计的时谐逆方法。

A time-harmonic inverse methodology for the design of RF coils in MRI.

作者信息

Lawrence Ben G, Crozier Stuart, Yau Desmond D, Doddrell David M

机构信息

Centre for Magnetic Resonance, University of Queensland, St Lucia Brisbane, Australia.

出版信息

IEEE Trans Biomed Eng. 2002 Jan;49(1):64-71. doi: 10.1109/10.972841.

DOI:10.1109/10.972841

PMID:11794773

Abstract

An inverse methodology is described to assist in the design of radio-frequency (RF) coils for magnetic resonance imaging (MRI) applications. The time-harmonic electromagnetic Green's functions are used to calculate current on the coil and shield cylinders that will generate a specified internal magnetic field. Stream function techniques and the method of moments are then used to implement this theoretical current density into an RF coil. A novel asymmetric coil operating for a 4.5 T MRI machine was designed and constructed using this methodology and the results are presented.

摘要

本文描述了一种逆向方法，以辅助设计用于磁共振成像（MRI）应用的射频（RF）线圈。利用时谐电磁格林函数来计算线圈和屏蔽圆柱体上的电流，这些电流将产生特定的内部磁场。然后使用流函数技术和矩量法将这种理论电流密度应用于RF线圈。采用该方法设计并构建了一种用于4.5T MRI机器的新型非对称线圈，并展示了结果。