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Abstract #0764

Resonance frequency detection of a stretchable RF receiver coil for MRI

Andreas Mehmann1, Christian Vogt1, Benjamin Sporrer2, Matija Varga1, Qiuting Huang2, and Gerhard Troester1

1Electronics Laboratory, ETH Zurich, Zurich, Switzerland, 2Integrated Systems Laboratory, ETH Zurich, Switzerland

Wearable RF receiver coils change their resonance frequency when stretched or bent. We propose a system that detects this change in resonance frequency. The system is integrated on a wearable MRI receiver of 20 x 30mm². The change in resonance frequency can be detected in-field. The detection works by sweeping an excitation current through a frequency range and measuring the frequency response. The frequency response is transmitted via a glass fibre to an out-field signal processing unit. Measurements were conducted using a stretchable liquid metal coil on neoprene.

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