The MRI measurements of the excised hearts providing stable “ground truth” high resolution images are important part of cardiac MRI at ultra-high field. We report the initial results of testing an in-house developed multiple element transceiver array (mTA) with parallel transmit support optimized for submillimeter spatial resolution ex-vivo heart tissue characterization MRI at 7T. The array testing included SNR, B1-shimming, g-factor, T2* and DTI mapping with high parallel imaging acceleration factors. The designed 8TX/16RX array demonstrated high efficiency of both TX and RX properties for (ultra)high ex-vivo myocardial tissue characterization imaging at 7T with essential superiority to a commercial 1TX/32RX coil.
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