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Abstract #4102

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

Elizaveta Motovilova1,2, Terry Ching3,4, Jana Vincent5, James Shin1, Ek Tsoon Tan2, Victor Taracila5, Fraser Robb5, Michinao Hashimoto3, Darryl Sneag2, and Simone Angela Winkler1
1Department of Radiology, Weill Cornell Medicine, New York, NY, United States, 2Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, United States, 3Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore, Singapore, 4Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore, 5GE Healthcare, Aurora, OH, United States


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.

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