Abstract #4326

Optimization of Remote RF Transmit Coil Elements and Arrays for 7T UHF Body MRI

Stefan HG Rietsch^1,2, Stephan Orzada¹, Andreas K Bitz³, Marcel Gratz^1,2, Mark E Ladd^1,3, and Harald H Quick^1,2

¹Erwin L. Hahn Institute for MR Imaging, University of Duisburg-Essen, Essen, Germany, ²Highfield and Hybrid MR Imaging, University Hospital Duisburg-Essen, Essen, Germany, ³Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany

Remote radiofrequency (RF) body coils are broadly used as built-in body RF coils for signal transmission in clinical MR systems at 1.5 and 3T. For ultra highfield MR at 7T, remote body coils in conjunction with pTx systems have recently been presented. In this work we present a modified micro stripline RF element with meanders and investigate the performance of a 7T remote RF transmit array for body imaging applications featuring 8 of these elements concerning coupling, degrees of freedom within the B₁⁺ fields, distribution of losses, power efficiency, and SAR efficiency.

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