openEMS - a free and open source equivalent-circuit (EC) FDTD simulation platform supporting cylindrical coordinates suitable for the analysis of traveling wave MRI applications
openEMS - a free and open source equivalent-circuit (EC) FDTD simulation platform supporting cylindrical coordinates suitable for the analysis of traveling wave MRI applications
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DOI：
10.1002/jnm.1875
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发表时间：
2013-11-01
影响因子：
1.6
通讯作者：
Erni, Daniel
中科院分区：
文献类型：
--
作者：
Liebig, Thorsten;Rennings, Andreas;Erni, Daniel
在本文中，我们提出了一个免费的和开源的平台，通过使用等效电路时域有限差分法（FDTD）的方法，适用于圆柱坐标有效地建模圆柱形物体。我们将讨论圆柱形FDTD网格的特殊特性，如在r=0时的网格奇异性，并讨论小半径的圆柱形子网格如何大大减少模拟时间。此外，我们将证明这种圆柱形等效电路FDTD方法的适用性和优势，以评估在高场（7T）行波磁共振成像（MRI）的背景下使用的新型共形环形天线。版权所有（c）2012约翰威利父子有限公司
In this paper, we present a free and open source platform by using the equivalent-circuit finite-difference time-domain (FDTD) method adapted to cylindrical coordinates to efficiently model cylindrically shaped objects. We will address the special characteristics of a cylindrical FDTD mesh such as the mesh singularity at r=0 and discuss how cylindrical subgrids for small radii can reduce the simulation time considerably. Furthermore, we will demonstrate the applicability and advantages of this cylindrical equivalent-circuit FDTD method to evaluate new types of conformal ring antennas used in the context of high-field (7T) traveling wave magnetic resonance imaging (MRI). Copyright (c) 2012 John Wiley & Sons, Ltd.