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tm - Technisches Messen

Plattform für Methoden, Systeme und Anwendungen der Messtechnik

[TM - Technical Measurement: A Platform for Methods, Systems, and Applications of Measurement Technology
]

Editor-in-Chief: Puente León, Fernando / Zagar, Bernhard

12 Issues per year


IMPACT FACTOR 2017: 0.476

CiteScore 2017: 0.46

SCImago Journal Rank (SJR) 2017: 0.239
Source Normalized Impact per Paper (SNIP) 2017: 0.566

Online
ISSN
2196-7113
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Volume 84, Issue 1

Issues

A metamaterial based dual-resonant coil element for combined sodium/hydrogen MRI at 7 Tesla

Ein Metamaterial-basiertes dual-resonantes Spulen-Element für kombinierte Natrium/Wasserstoff MRT bei 7 Tesla

Jan Taro Svejda
  • Corresponding author
  • General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg Germany
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Andreas Rennings
  • General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Daniel Erni
  • General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-11-24 | DOI: https://doi.org/10.1515/teme-2016-0039

Abstract

A single coil element based on a composite right/left-handed (CRLH) metamaterial transmission line for combined sodium and hydrogen MRI is presented. It provides the particular feature of equal quarter-wavelength current and electromagnetic (EM) field distributions at the two distinct Larmor frequencies of 23Na- and 1H-nuclei at 7 T magnetic flux density. The functionality of a manufactured prototype is validated through near-field measurements that are compared with finite-difference time-domain (FDTD) simulations. Finally, results of a first successful MRI experiment are presented for a canister phantom including ping-pong ball insets filled with different liquids of high sodium concentrations.

Zusammenfassung

In diesem Beitrag wird ein Spulen-Element, basierend auf einer composite right/left-handed (CRLH) Metamaterialleitung, für kombinierte Natrium- und Wasserstoff-MRT vorgestellt. Es bietet die Besonderheit, bei den Resonanzfrequenzen der 23Na- und 1H-Kerne im 7 T Magnetfeld, jeweils gleichartige Viertel-Wellen-Stromverteilungen und elektromagnetische (EM) Feldverteilungen zu erzeugen. Die Funktionalität eines gefertigten Prototyps wurde mittels Vergleichen von Nahfeld-Messungen mit entsprechenden FDTD-(finite-difference time-domain)-Simulationen validiert. Abschließend werden Aufnahmen aus einem ersten erfolgreichen MRT-Experiment gezeigt bei dem ein Phantom genutzt wurde, welches Tischtennisbälle enthält, die wiederum mit natriumreichen Flüssigkeiten gefüllt sind.

Keywords: UHF-MRI; MRS; 7T; CRLH; Metamaterial; X-nuclei; Sodium; 23Na

Schlagwörter: UHF-MRI; MRS; 7T; CRLH; Metamaterial; X-Kern; Natrium; 23Na

About the article

Jan Taro Svejda

Jan Taro Svejda received in 2008 a B.Sc. degree in Communications and Information Technology from the University of Applied Science, Düsseldorf, Germany, and in 2013 a M.Sc. degree in Electrical Engineering and Information Technology from the University of Duisburg-Essen, Duisburg, Germany, respectively. He is currently working toward the Ph.D. degree in electrical engineering at the University of Duisburg-Essen. His general research interest includes all aspects of theoretical and applied electromagnetics, currently focusing on medical applications, electromagnetic metamaterials, and scientific computing methods.

General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg, Germany

Andreas Rennings

Andreas Rennings studied electrical engineering at the University of Duisburg-Essen, Germany. He carried out his diploma work at the Microwave Electronics Laboratory of the University of California at Los Angeles. He received his Dipl.-Ing. and Dr.-Ing. degrees from the University of Duisburg-Essen in 2000 and 2008, respectively. From 2006 to 2008, he was with IMST GmbH in Kamp-Lintfort, Germany, where he worked as an RF engineer. Since then, he is a senior scientist at the Laboratory for General and Theoretical Electrical Engineering of the University of Duisburg-Essen, leading several research projects. His general research interests include all aspects of theoretical and applied electromagnetics, currently with a focus on medical applications. He has authored and co-authored over 80 conference and journal papers and one book chapter and filed eight patents. He received several awards, including the second price within the student paper competition of the 2005 IEEE Antennas and Propagation Society Intern al Symposium and the VDE-Promotionspreis 2009 for his doctoral thesis.

General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg, Germany

Daniel Erni

Daniel Erni is a full professor at the University of Duisburg-Essen, Germany. He received his two degrees in electrical engineering from HSR Rapperswil and ETH Zurich in 1986 and 1990, respectively, and his PhD degree in laser physics from ETH Zurich in 1996. He has coauthored over 300 publications. His current research interests include optical interconnects, nanophotonics, plasmonics, optical and electromagnetic metamaterials, RF and biomedical engineering, computational electromagnetics, multiscale multiphysics modeling, and numerical structural optimization.

General and Theoreticel Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, and CENIDE – Center for Nanointegration Duisburg-Essen, D-47048 Duisburg, Germany


Revised: 2016-10-24

Accepted: 2016-10-24

Received: 2016-09-23

Published Online: 2016-11-24

Published in Print: 2017-01-28


Citation Information: tm - Technisches Messen, Volume 84, Issue 1, Pages 2–12, ISSN (Online) 2196-7113, ISSN (Print) 0171-8096, DOI: https://doi.org/10.1515/teme-2016-0039.

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