A multi-square slot surface coil was developed for rodent MRI at 11.7 T. The coil prototype was 20 mm in diameter with six square slots. Electromagnetic simulations of the slotted and circular coils were conducted to evaluate the signal-to-noise ratio (SNR) and absorption rate (SAR). Experimental SNR results were also calculated and compared, and the comparison showed good agreement between experimental and numerical data. The slotted coil produces lower predicted SAR for points near the coil plane when compared to the SAR numerical values for the circular coil. The performance of prototype, measured via the Q factor, was $$Q_l 6.5 = Q_u$$ Q l 6.5 = Q u , and its noise figure was 1.6. A commercial circular coil was used to acquire phantom images for comparison purposes. The slotted surface coil showed comparable performance with a commercial circular coil in UHF MRI applications. These experimental and numerical results demonstrate the feasibility of the slotted coil design at 11.7 T.

中文翻译：

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用于 11.7 T 的 UHF MRI 的多方形槽表面线圈的实验验证

为啮齿动物 MRI 在 11.7 T 开发了多方形槽表面线圈。线圈原型直径为 20 毫米，带有六个方形槽。对开槽线圈和圆形线圈进行电磁模拟以评估信噪比 (SNR) 和吸收率 (SAR)。还计算和比较了实验 SNR 结果，比较表明实验数据和数值数据之间具有良好的一致性。与圆形线圈的 SAR 数值相比，开槽线圈对线圈平面附近的点产生较低的预测 SAR。通过 Q 因子测量的原型性能为 $$Q_l 6.5 = Q_u$$ Q l 6.5 = Q u ，其噪声系数为 1.6。商用圆形线圈用于获取幻像图像以进行比较。开槽表面线圈在 UHF MRI 应用中表现出与商用圆形线圈相当的性能。这些实验和数值结果证明了 11.7 T 开槽线圈设计的可行性。