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Towards an Untethered Ultrasound Beamforming System for Brain Stimulation in Behaving Animals | IEEE Conference Publication | IEEE Xplore

Towards an Untethered Ultrasound Beamforming System for Brain Stimulation in Behaving Animals


Abstract:

In this paper, we present a wireless ultrasound transmit (TX) beamforming system, potentially enabling wearable brain stimulation for small awake/behaving animals. The sy...Show More

Abstract:

In this paper, we present a wireless ultrasound transmit (TX) beamforming system, potentially enabling wearable brain stimulation for small awake/behaving animals. The system is comprised of a 16-element capacitive micromachined transducer (CMUT) array, driven by a custom phased-array integrated circuit (IC), which is capable of generating high-voltage (13.5 V) excitation signals with sixteen phase delays and four amplitude levels. In addition, a Bluetooth low-energy module and a power management unit were integrated into the system, which realizes a battery-operated self-contained unit. We validated the functionality of the system by demonstrating beamforming and steering with a hydrophone measurement setup. We achieved an acoustic pressure output of 554 kPapp at the depth of 5 mm, which corresponds to a spatial-peak pulse-average intensity (ISPPA) of 2.9 W/cm2. The measured 6-dB beamwidth (0.4 mm) is promising in that it can stimulate a specific region of the brain, especially for small animals such as mice. Further smart partitioning of the system will enable a truly wearable device for small animals.
Date of Conference: 18-21 July 2018
Date Added to IEEE Xplore: 28 October 2018
ISBN Information:

ISSN Information:

PubMed ID: 30440697
Conference Location: Honolulu, HI, USA

References

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