Fabrication Methods for Stretchable, Self-tuning Multi-element Liquid Metal Coil Arrays (LiquiTune)

作者：Elizaveta Motovilova, Terry Ching, Jana Vincent, James Shin, Ek T. Tan, Victor Taracila, Fraser Robb, Michinao Hashimoto, Darryl B. Sneag, Simone Winkler · 发表于：Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 年份：2023 · DOI：10.58530/2022/4102 · 被引用次数：2 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Advanced Materials and Mechanics、Electrospun Nanofibers in Biomedical Applications

We recently proposed a self-tuning stretchable receive coil concept in a single element. Here, we expand the technique to a multi-element array and compare 3 fabrication techniques: 1) single layer, 2) double layer, 3) direct ink writing (DIW). Numerical simulations are used to find the critical overlap for decoupling. In vitro experiments demonstrate almost identical sensitivity between the 3 techniques and between coil elements. DIW is most suitable due to its mechanical stability and thinner/less MR-visible coil elements with a frequency stability of 128+/-0.6 MHz (0 to 30% of stretch) and an SNR improvement of 50% over a commercial coil.