An eight-channel, nonoverlapping phased array coil with capacitive decoupling for parallel MRI at 3 T

Cornelius Von Morze, James Tropp, Suchandrima Banerjee, Duan Xu, Kostas Karpodinis, Lucas Carvajal, Christopher P. Hess, Pratik Mukherjee, Sharmila Majumdar, Daniel B. Vigneron

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

An eight-channel, nonoverlapping phased array coil was designed for conventional and parallel imaging of the brain and the hip at 3T. The nonoverlapping design was selected on the basis of reduced parallel reconstruction noise inflation, as predicted by the diminution of g-factor hotspots in SENSE reconstruction simulations, and the higher peripheral signal-to-noise ratio (SNR) expected from smaller coil elements. A capacitive bridging technique, modeled by a circuit simulation, reduced the crosstalk between nearest neighbors to a manageable level. The capacitive decoupling technique was effective enough to allow the coil to be operated using standard system preamplifiers. The coil was shown to be useful for several conventional and parallel imaging applications. SNR improvements over a commercial eight-channel head coil were demonstrated in important structures in EPI-SENSE diffusion-weighted imaging. High-resolution MRSI (0.22 cc) yielded SN R of up to 21 for the NAA peak in the cortical gray matter. The coil also provided excellent fourfold accelerated GRAPPA images of the hip.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalConcepts in Magnetic Resonance Part B: Magnetic Resonance Engineering
Volume31
Issue number1
DOIs
StatePublished - Feb 1 2007

Keywords

  • Brain, hip
  • Decoupling
  • Parallel imaging
  • Phased array
  • RF coils

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