Abstract #1569

Quality assurance of 8-channel transmit/receive switches for a 32-channel transmit/receive system at 7T UHF MRI

Stefan HG Rietsch^1,2, Maximilian N Voelker^1,2, Stephan Orzada¹, Daniel Leinweber¹, Mark E Ladd^1,3,4, and Harald H Quick^1,2

¹Erwin L. Hahn Institute for MR Imaging, Essen, Germany, ²High-Field and Hybrid MR Imaging, University of Duisburg-Essen, Essen, Germany, ³Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ⁴Faculty of Physics and Astronomy and Faculty of Medicine, University of Heidelberg, Heidelberg, Germany

With increasing number of transmit and receive channels it becomes more and more important to monitor the behavior of the RF chain over time since weaknesses of custom-built hardware need to be known to the investigator. In this work, a quality assurance procedure for four identical 8-channel transmit/receive switchboxes for a 32-channel transmit/receive MR system at 7T is presented. In repeated measurements of a homogeneous phantom with an 8-channel transmit/receive coil, metrics like flip angle distribution, SNR and noise correlation are used to automatically assess quantitatively if significant changes of the hardware did occur.

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