In this work, we investigated the potential of the smaller sizes of the Tic-Tac-Toe transmit coil elements, comparing the newly developed uncoupled configuration with the traditional coupled version of this RF coil design. Simulations with 14 Tic-Tac-Toe panels showed excellent levels of transmit field homogeneity at 7T (coefficient of variation = 12.6%, average = 0.28µT for 1W) while maintaining low levels of SAR (SAR efficiency = 1.41 µT/√(W/Kg)). The simulations were validated with phantom experiments. Future work includes the assembling of the 28-channel transmit coil and the investigation of the optimal power splitting strategy.
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