Abstract #1607

Simulation of an 8-Channel Transmit Meander Stripline Array for Combined Head and Neck Imaging at 7 Tesla MRI

Denis A. Mai^1,2,3,4, Thomas M. Fiedler², Neil Knöbel^1,3,5, Luca Wessing^1,6, Oliver Kraff¹, Titus Lanz⁷, Harald H. Quick^1,3, and Markus W. May^1,3

¹Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany, ²Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ³High-Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany, ⁴Institute of Electrical Engineering and Information Technology, South Westphalia University of Applied Sciences, Iserlohn, Germany, ⁵Institute of Electrical Engineering and Information Technology, FH Aachen – University of Applied Sciences, Aachen, Germany, ⁶Institute of Measuring and Sensor Technology, Ruhr West University of Applied Sciences, Mülheim a. d. Ruhr, Germany, ⁷RAPID Biomedical GmbH, Rimpar, Germany

Synopsis

Keywords: High-Field MRI, High-Field MRI, Head & Neck/ENT, coil arrays

Motivation: Covering the head-neck region in UHF MRI is challenging due to the limited number of only 8 parallel transmission (pTx) channels available in most UHF MR systems.

Goal(s): Our goal was to design and simulate an 8-channel pTx coil for combined head/neck imaging at 7T.

Approach: A geometrical setup for MR imaging with modified stripline elements was investigated by simulating the B₁⁺ efficiency in a heterogenous tissue model.

Results: B₁⁺ efficiency maxima of 0.31 μT/√W for head region and 0.13 μT/√W for neck region with SAR_10g maximum of 1.21 W/kg for 1W stimulated input power per channel could be achieved.

Impact: Meander stripline elements can be overlapped while showing only low coupling, allowing a good coverage of the head-neck area while only using 8 pTx elements in total.

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