High-resolution MRI of the carotid arteries using a leaky waveguide transmitter and a high-density receive array at 7 T

W. Koning, J.J. Bluemink, E.A.J. Langenhuizen, A.J. Raaijmakers, A. Andreychenko, C.A.T. van den Berg, P.R. Luijten, J.J.M. Zwanenburg, D.W.J. Klomp

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24 Citations (Scopus)

Abstract

A setup for 7T MRI of the carotid arteries in the neck was designed and constructed. Separate dedicated arrays were used for transmit and receive. For the transmit array, single-side adapted dipole antennas were mounted on a dielectric pillow, which was shown to serve as a leaky waveguide, efficiently distributing B1 into the neck. Risk assessment was performed by simulations. Phantom measurements were performed to establish optimal positions of the antennas on the pillow. Using two antennas, a dual transmit setup was created. In vivo B1 (+) maps with different shim configurations were acquired to assess transmit performance. This effective transmit array was used in combination with a dedicated 30 channel small element receive coil. High-resolution in vivo turbo spin echo images were acquired to demonstrate the excellent performance of the setup.

Original languageEnglish
Pages (from-to)1186-1193
Number of pages8
JournalMagnetic Resonance in Medicine
Volume69
Issue number4
DOIs
Publication statusPublished - Apr 2013
Externally publishedYes

Keywords

  • Carotid Arteries
  • Equipment Design
  • Equipment Failure Analysis
  • Humans
  • Image Enhancement
  • Magnetic Resonance Angiography
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Transducers
  • Journal Article
  • Research Support, Non-U.S. Gov't

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  • Cite this

    Koning, W., Bluemink, J. J., Langenhuizen, E. A. J., Raaijmakers, A. J., Andreychenko, A., van den Berg, C. A. T., Luijten, P. R., Zwanenburg, J. J. M., & Klomp, D. W. J. (2013). High-resolution MRI of the carotid arteries using a leaky waveguide transmitter and a high-density receive array at 7 T. Magnetic Resonance in Medicine, 69(4), 1186-1193. https://doi.org/10.1002/mrm.24345