Higher-order harmonic transmission-line RF coil design for MR applications

Xiaoliang Zhang, Xiao Hong Zhu, Wei Chen

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

A novel concept based on the use of higher-order harmonic resonances in a transmission-line resonator is introduced for the design of high-frequency RF coils at high and ultrahigh fields, where conventional RF coil designs present difficulties and limitations. To demonstrate this concept, we successfully designed and fabricated a 400-MHz RF coil for rat imaging using a second-harmonic resonant microstrip transmission line. This coil has a high Q-factor, reduces coil-cable interactions without the use of a matching balun, and has a broad range for tuning the coil's resonant frequency at the loaded condition. This work demonstrates that the use of higher-order harmonics in a transmission-line resonator provides an alternative, efficient approach to the design of large and high-frequency RF coils.

Original languageEnglish (US)
Pages (from-to)1234-1239
Number of pages6
JournalMagnetic resonance in medicine
Volume53
Issue number5
DOIs
StatePublished - May 2005

Keywords

  • Brain
  • High field
  • Higher-order harmonic resonance
  • MR imaging
  • Microstrip transmission line
  • RF coil

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