Effects of Coplanar Shielding for High Field MRI Conference Paper uri icon

abstract

  • This work investigates the efficacy of "coplanar shielding," in which copper shields are oriented concentric and coplanar to the RF coils rather than implemented as a full ground plane behind them. Following FDTD simulations to determine optimal shielding parameters, two coil geometries were constructed: a circular loop surface coil and a half-volume five-element receive array. Each was evaluated using bench measurements with and without coplanar shielding. Imaging, including accelerated SENSE imaging, was performed with the shielded and unshielded receive arrays on a whole-body 7T scanner. Results from modeled and fabricated coils showed good agreement with improvements in Q factors for all cases. Imaging showed substantial improvements in SNR and g-factors for the coplanar shielded array.

altmetric score

  • 0.25

author list (cited authors)

  • Rispoli, J. V., Wilcox, M. D., By, S., Wright, S. M., & McDougall, M. P.

citation count

  • 2

publication date

  • August 2016

publisher