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Abstract #0746

The MRDust: An Implantable Neural Interface Powered via Focused Ultrasound with Data Communication via MR Image Modulation

Biqi Rebekah Zhao1, Yuhan Wen1, Alexander Chou1, Elad Alon1, Rikky Muller1, Chunlei Liu1, and Michael Lustig1
1Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, United States

Synopsis

Keywords: New Devices, NeuroscienceWe propose a new device for neuroscience studies: the MRDust, a sub-mm wireless programmable neural recording mote with on-device memory and compute. It receives power via focused ultrasound, records neural signals in burst mode, and uses a micro-coil to perturb local magnetic fields to achieve data uplink via dynamic MRI signal modulation. We demonstrate proof-of-concept experiments in which digital information is encoded in images of an SE-EPI dynamic sequence, and in which a piezoelectric harvester can harvest enough ultrasonic power to sustain device operation, and receive control signals through amplitude modulation.

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