OpenEMS – a free and open source equivalent‐circuit (EC) FDTD simulation platform supporting cylindrical coordinates suitable for the analysis of traveling wave MRI applications. (10th December 2012)

• Record Type: Journal Article
• Authors: Liebig, Thorsten; Rennings, Andreas; Held, Sebastian; Erni, Daniel
• Other Names: Yin Wei Yan guestEditor.; Weile Daniel S. guestEditor.
• Is Part Of: International journal of numerical modelling. Volume 26:Number 6(2013:Nov./Dec.)
• Page Start: 680
• Page End: 696
• Publication Date: 2012-12-10
• Subjects: FDTD -- EC FDTD -- cylindrical mesh -- multigrid -- traveling wave MRI; Electric networks -- Mathematical models -- Periodicals; Electronics -- Mathematical models -- Periodicals; 621.3011
• DOI: 10.1002/jnm.1875
• Languages: English
• ISSNs: 0894-3370

Abstract

SUMMARY: 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 © 2012 John Wiley & Sons, Ltd.