Abstract #4404

Static and dynamic parallel transmission (pTx) for human cardiac MRI at 21.0 T

Bilguun Nurzed¹, Dennis Hieronymi¹, Thomas Wilhelm Eigentler¹, Christoph Stefan Aigner², Sebastian Schmitter², and Thoralf Niendorf^1,3,4

¹Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, ²Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany, ³Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine, Berlin, Germany, ⁴MRI.TOOLS, Berlin, Germany

Synopsis

Keywords: Shims, RF Arrays & Systems, CardiovascularTransmission field inhomogeneities at ultrahigh and extreme field MRI can be offset using static or dynamic pTx. Responding to the challenges and recognizing the opportunities of cardiac MRI, this abstract examines the feasibility of parallel transmission (pTx) using self-grounded bow-tie (SGBT) RF array configurations for static and dynamic B₁⁺ homogenization of the heart at 21.0T. Our results demonstrate that static pTx provides limited performance at 21.0 T, but dynamic pTx enables uniform heart excitation at 21.0T

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