无线可调谐眼镜式线圈提升眼部MRI信号，不损失脑部图像质量。
Low-Cost and Detunable Wireless Resonator Glasses for Enhanced Eye MRI with Concurrent High-Quality Whole Brain MRI
- 设计轻便无线可调LC环形线圈，嵌入3D打印镜架贴近眼部。
- 眼区信噪比最高提升3倍，全脑无明显信号损失。
- 无需改造设备，适合高场强下眼脑同步成像研究。
目的：开发并评估一种可穿戴无线谐振器眼镜设计，以在7特斯拉下增强眼部MRI信噪比（SNR），同时不损害全脑图像质量。方法：该装置将两个可调谐LC环形谐振器集成于轻量化3D打印镜架中，置于眼部附近。谐振器与标准2Tx/32Rx头线圈被动耦合，无需硬件修改。通过台架测试评估调谐、隔离与可调谐性能；在头肩模拟体模中测量B1+分布图，并在体模和活体实验中获取信噪比分布图。结果：台架测试证实调谐准确、元件间隔离性强、被动调谐有效。体模B1+映射显示有无谐振器配置间无显著差异。体模及活体成像显示眼区信噪比最高提升约3倍，脑区未见可测信噪比下降。结论：该无线谐振器眼镜提供低成本、易用的解决方案，可在超高场强下同时实现眼部信噪比增强与全脑图像质量保持，支持专用眼部MRI及眼脑同步成像。
原文摘要 · Abstract (English)
Purpose: To develop and evaluate a wearable wireless resonator glasses design that enhances eye MRI signal-to-noise ratio (SNR) without compromising whole-brain image quality at 7 T. Methods: The device integrates two detunable LC loop resonators into a lightweight, 3D-printed frame positioned near the eyes. The resonators passively couple to a standard 2Tx/32Rx head coil without hardware modifications. Bench tests assessed tuning, isolation, and detuning performance. B1$^+$ maps were measured in a head/shoulder phantom, and SNR maps were obtained in both phantom and in vivo experiments. Results: Bench measurements confirmed accurate tuning, strong inter-element isolation, and effective passive detuning. Phantom B1$^+$ mapping showed negligible differences between configurations with and without the resonators. Phantom and in vivo imaging demonstrated up to about a 3-fold SNR gain in the eye region, with no measurable SNR loss in the brain. Conclusion: The wireless resonator glasses provide a low-cost, easy-to-use solution that improves ocular SNR while preserving whole-brain image quality, enabling both dedicated eye MRI and simultaneous eye-brain imaging at ultrahigh field.
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