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Abstract #4388

Evaluation of the coax monopole antenna as a transmit array element for head imaging at 14T

Lyanne Budé1, Koen Vat2, Ingmar Voogt3, Irena Zivkovic1, and Alexander Raaijmakers2,4
1Electrical Engineering, University of Technology Eindhoven, Eindhoven, Netherlands, 2Biomedical Engineering, University of Technology Eindhoven, Eindhoven, Netherlands, 3Wavetronica B.V., Geldermalsen, Netherlands, 4Imaging and Oncology, UMC Utrecht, Utrecht, Netherlands

Synopsis

Keywords: High-Field MRI, RF Arrays & Systems

Motivation: The recently introduced coax monopole antenna could be a suitable head coil array element for the 14T MRI system, which is being developed for installation in Nijmegen, the Netherlands.

Goal(s): Evaluate the performance of the coax monopole antenna at 600MHz and compare the fractionated dipole.

Approach: Eight-channel FDTD simulations were performed on human model Duke to evaluate B1+ and SAR distributions. Prototypes were built for S-parameter evaluation.

Results: The coax monopole and fractionated dipole perform similar in terms of B1+ and SAR efficiency. The coax monopole has lower reflection and coupling.

Impact: The coax monopole antenna would be an excellent candidate for transmit head coil arrays at 14T MRI, due to its high SAR efficiency and low coupling. Additionally, its single-ended design facilitates cable routing, particularly in a spatially restricted environment.

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