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Abstract #1511

B1 performance when excluding RF shields from transmit head coils to simplify multi nuclei and gradient insert setups

D. Welting1, I. Chavarria Marques1, M. Fantasia1, Q. van Houtum1, B.R. Steensma1, E. Versteeg1, J.P. Wijnen1, and D.W.J. Klomp1

1Radiology, University Medical Center Utrecht, Utrecht, Netherlands

RF shielding in MRI is used to enhance B1 efficiency of RF coils by reducing radiation losses and prevent coupling to surrounding materials like the gradient coil (1). However, RF shielding can also complicate the design of RF coils, particularly when used in multi-model setups, like for multi-nuclei experiments or when combined with gradient inserts. Here we demonstrate that the closely fitted RF shield of a head-coil can be removed to use the RF shield inside the bore liner of the MRI system in order to maintain high B1 efficiency.

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