Novel multi-channel transmission line coil for high field magnetic resonance imaging

Can Eyup Akgun, Lance DelaBarre, Sung Min Sohn, Carl Snyder, Gregor Adriany, Kamil Ugurbil, John Thomas Vaughan, Anand Gopinath

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Radiofrequency (RF) coils are the antenna-like devices used in magnetic resonance imaging (MRI) to inductively excite and receive the nuclear magnetic resonance (NMR) signal in anatomy. This nuclear magnetic induction is most efficient at the field strength dependent Larmor frequency for a nuclear species. Coils must resonate at Larmor frequencies of 300 MHz or more to take advantage of the signal-to-noise benefits of 7T+ MRI. In high water content tissue dielectrics however, the wavelengths at these frequencies are 12cm and less, significantly shorter than human anatomic dimensions. One consequence of these short wavelengths is a highly non-uniform RF excite field. In this investigation, we aim to mitigate this problem through a novel coil element design. The traditional microstrip line element is modified into a multi-section alternating impedance configuration to homogenize the magnetic field over the coil length. Feasibility of this approach is numerically simulated, and then empirically validated by phantom and human imaging.

Original languageEnglish (US)
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages1425-1428
Number of pages4
DOIs
StatePublished - Dec 1 2009
Event2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States
Duration: Jun 7 2009Jun 12 2009

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Other

Other2009 IEEE MTT-S International Microwave Symposium, IMS 2009
CountryUnited States
CityBoston, MA
Period6/7/096/12/09

Keywords

  • Impedance
  • MRI
  • Microstrip
  • RF coils
  • Resonators

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  • Cite this

    Akgun, C. E., DelaBarre, L., Sohn, S. M., Snyder, C., Adriany, G., Ugurbil, K., Vaughan, J. T., & Gopinath, A. (2009). Novel multi-channel transmission line coil for high field magnetic resonance imaging. In IMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest (pp. 1425-1428). [5165974] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2009.5165974