Abstract #4583

Simulation and Comparison of Transmit Elements for 7T Head-Imaging with a Large Diameter Transmit Coil

Max Joris Hubmann^1,2, Robert Kowal ^2,3, Stephan Orzada⁴, Piet Wagner⁵, Frank Seifert⁵, Oliver Speck^2,3, and Holger Maune²

¹Siemens Healthineers GmbH, Magdeburg, Germany, ²Otto-von-Guericke University, Magdeburg, Germany, ³Research Campus STIMULATE, Magdeburg, Germany, ⁴Deutsches Krebsforschungszentrum Heidelberg, Heidelberg, Germany, ⁵Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany

Synopsis

Keywords: Non-Array RF Coils, Antennas & Waveguides, Non-Array RF Coils, Antennas & Waveguides12 transmission coil designs for 7T head imaging are compared using EM simulations for a large diameter transmit coil. The highest power and SAR efficiency are achieved by loop coils, a passively-fed dipole shows the highest intrinsic decoupling and an IMARS the lowest load dependence. The results provide insight to each element's performance. To make a final decision on a coil element, the array performance must also be evaluated in the futur, as this may differ from the performance of the single element performance. Thus, the decision on a particular transmit element depends on the coil's application and configuration.

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