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Abstract #2757

Transmit Array with Novel Shield and Fabrication Technique for Reducing Losses at UHF

Debra S. Rivera1, 2, Thomas Siegert, Carsten Koegler2, 3, Andreas Schaefer2, Markus Nikola Streicher, Robert Turner2

1Univercity Medical Center, Utrecht, Netherlands; 2Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Saxony, Germany; 3RAPID Biomedical, Rimpar, Germany

The authors present a 7T head transmit array made of interlocking printed circuit boards (PCBs). The two-stage prototyping process, focused on minimizing radiation losses and coil asymmetries. A transparent mesh shield was used which suppresses eddy-currents and allows line-of-sight to the region of interest. Data was collected with a cylindrical phantom for the hand-built prototype, and for the PCB array with two different shields. The greatest symmetry and power transmitted to the phantom was observed for the PCB array with the transparent shield. Anatomical phantom or brain data is projected to be available for the conference.