Abstract #1569

Radiofrequency Array Concepts for Cardiac MRI at 10.5 T and 14.0 T: Does an Increased Channel Count Really Help?

Thomas Wilhelm Eigentler^1,2, Bilguuun Nurzed¹, Andre Kuehne³, and Thoralf Niendorf^1,3,4

¹Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, ²Technische Universität Berlin, Chair of Medical Engineering, Berlin, Germany, ³MRI.TOOLS GmbH, Berlin, Germany, ⁴Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, Berlin, Germany

Synopsis

The gain in signal-to-noise ratio is driving the ultrahigh field and extreme field MRI. This work highlights the opportunities and electromagnetic constraints of realistic radiofrequency array concepts tailored for cardiovascular MRI at 7.0T, 10.5T, and 14.0T. For this purpose electromagnetic field simulations were performed using 32, 48 and 64-channel RF transceiver array configurations at 7.0T, 10.5T, and 14.0T. Our findings demonstrate, that a higher channel count increases the degrees of freedom of B₁⁺ shaping. Furthermore, the preliminary results provide a strong mandate for static PTX or even dynamic PTX tailored at the heart at 10.5T and 14.0T.

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