Abstract #0747

Customized B1+-Shaping using Multi-Channel Transceiver Array Prototype for 7T Cardiac MRI with Central Elements Symmetry

Maxim Terekhov¹, Ibrahim A. Elabyad¹, Frank Resmer², Titus Lanz², Theresa Reiter^1,3, David Lohr¹, Wiebke Schlöttelburg^1,4, and Laura M. Schreiber¹

¹Chair of Cellular and Molecular Imaging, Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Wuerzburg, Germany, ²RAPID Biomedical, Rimpar, Germany, ³Department of Internal Medicine l, University Hospital Wuerzburg, Wuerzburg, Germany, ⁴Institute of Diagnostic and Interventional Radiology, University Hospital Wuerzburg, Wuerzburg, Germany

Multiple element transmits and receive (mTx) phased arrays allow for improvement of the image quality in ultra-high-field (B0≥7T) cardiac MRI (cMRI). The optimization performed for both transmit and receive requires novel approaches regarding mTx element geometry and positioning making а B1-shimming of such arrays a complicated problem. We have demonstrated the initial experience of the case-specific B1-shimming of the mTX-array design for cMRI at 7T. The design with a central symmetry of elements and tailored cost function used for driving phases optimization allows for high flexibility in shaping of predefined target B1+ profiles.

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