One of the main concerns in fetal MRI is the amount of power that is deposited both in the fetus and the mother. In this work, we show that a well-designed high-permittivity pad can tailor the energy of the RF field such that the transmit efficiency increases and the field becomes more homogeneous. The increase in transmit efficiency subsequently enables a substantial reduction in the SAR in both the mother and the fetus for models of the third, seventh, and ninth months of gestation.
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