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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 Reiter1,3, David Lohr1, Wiebke Schlöttelburg1,4, 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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