Abstract #2142

Cost-Efficient 7ch Rx Shoulder Array for 7T UHF MRI Featuring External Switchbox Detuning

Stefan HG Rietsch^1,2, Oliver Kraff¹, Stephan Orzada¹, Andrea Lazik³, and Harald H Quick^1,2

¹Erwin L. Hahn Institute for MR Imaging, University of Duisburg-Essen, Essen, Germany, ²High Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany, ³Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany

MRI at 7T and above opens the field for high resolution human imaging for example in the shoulder. In order to improve a present setup consisting of an 8ch Tx/Rx shoulder coil using microstrip line elements with meanders, we present an additional low cost 7ch Rx loop coil and utilize a simple approach for detuning of this coil during transmit via a custom built 8ch Tx/Rx switchbox. With the additional 7ch Rx coil a factor of 2 in SNR can be achieved in the center of the humeral head in proton-density weighted images with a spatial resolution of 0.4x0.4x2.5 mm³.

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