Abstract #3901

Transceiver 8Tx/32Rx array with L-shaped loop elements for accelerated cardiac MRI at 7T: initial optimization and experimental testing.

Maxim Terekhov¹, Ibrahim A. Elabyad¹, David Lohr¹, Anna Frey², Florian Schnitter², and Laura M. Schreiber¹

¹Chair of Cellular and Molecular Imaging,Comprehensive Heart Failure Center, University Hospital Würzburg, Wuerzburg, Germany, ²Department of Internal Medicine I, Cardiology, University Hospital Würzburg, Wuerzburg, Germany

Synopsis

Keywords: RF Arrays & Systems, Parallel Transmit & Multiband, cardiovascularThe concept of the L-shaped loop elements architecture with the antisymmetric arrangement was applied to develop a 8Tx/32Rx transceiver array for cardiac MRI at 7T. This work aimed to check B₁⁺ shimming and parallel imaging capabilities of the array and to perform the initial testing in human thorax phantom and pig cadaver. Both phase-only and pTX optimization modes demonstrated the possibility for efficient shaping of B1+ with an optimized spatial homogeneity. Despite the sub-optimal geometry of the pig thorax, the array demonstrated a good B1+ coverage of the heart region with no apparent destructive interferences.

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