A 32-channel lattice transmission line array for parallel transmit and receive MRI at 7 tesla

Gregor Adriany, Edward J. Auerbach, Carl J. Snyder, Ark Gözübüyük, Steen Moeller, Johannes Ritter, Pierre François Van De Moortele, Tommy Vaughan, Kâmil Uǧurbil

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Transmit and receive RF coil arrays have proven to be particularly beneficial for ultra-high-field MR. Transmit coil arrays enable such techniques as B1+ shimming to substantially improve transmit B 1 homogeneity compared to conventional volume coil designs, and receive coil arrays offer enhanced parallel imaging performance and SNR. Concentric coil arrangements hold promise for developing transceiver arrays incorporating large numbers of coil elements. At magnetic field strengths of 7 tesla and higher where the Larmor frequencies of interest can exceed 300 MHz, the coil array design must also overcome the problem of the coil conductor length approaching the RF wavelength. In this study, a novel concentric arrangement of resonance elements built from capacitively-shortened half-wavelength transmission lines is presented. This approach was utilized to construct an array with whole-brain coverage using 16 transceiver elements and 16 receive-only elements, resulting in a coil with a total of 16 transmit and 32 receive channels.

Original languageEnglish (US)
Pages (from-to)1478-1485
Number of pages8
JournalMagnetic resonance in medicine
Volume63
Issue number6
DOIs
StatePublished - Jun 2010

Keywords

  • 7T
  • Concentric coils
  • High field
  • RF coil design
  • Transmission line coils
  • Transmit array

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