A High Sensitive and Low Parasitic Capacitance Folding Micro Coil with Multilayered Zigzag Diameter Wiring

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This paper reports on a high sensitive and low parasitic capacitance folding micro coil with multilayered zigzag diameter wiring used as an RF coil for Magnetic resonance imaging (MRI). This coil was fabricated by assembling a flexible substrate with an unfolded wiring pattern and 3D printed jigs with hollow skeletal structures. So as not to increase the parasitic capacitance, this coil has a multilayered zigzag structure with different coil diameters for each turn to reduce the overlapped area of wiring and 3D printed jigs with hollow skeletal structures were adopted not to exist jigs with a high dielectric constant between coil wirings. As a result, since the parasitic capacitance increased slightly compared to the increase in the number of turns, high sensitive MRI images can be taken using our coil.

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