Flexible Piezoelectric Sensors for Miniaturized Sonomyography

Cerezo Sanchez, M., Zuo, S., Moldovan, A., Cochran, S. , Nazarpour, K. and Heidari, H. (2021) Flexible Piezoelectric Sensors for Miniaturized Sonomyography. In: 2021 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 01-05 Nov 2021, pp. 7373-7376. ISBN 9781728111797 (doi: 10.1109/EMBC46164.2021.9630342)

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Abstract

Sonomyography refers to the measurement of muscle activity with an ultrasonic transducer. It is a candidate modality for applications in diagnosis of muscle conditions, rehabilitation engineering and prosthesis control as an alternative to electromyography. We propose a mechanically-flexible piezoelectric sonomyography transducer. Simulating different components of the transducer, using COMSOL Multiphysics ® software, we analyze various electromechanical parameters, such as von Mises stress and charge accumulation. Our findings on modelling of a single-element device, comprised of a PZT-5H layer of thickness 66µm, with a polymer substrate (E = 2.5 GPa), demonstrate optimal flexibility and charge accumulation for sonomyography. The addition of Polyimide and PMMA (Polymethyl methacrylate) as an acoustic matching layer and an acoustic lens, respectively, allowed for adequate energy transfer to the medium, whilst still maintaining good mechanical properties. In addition, preliminary ultrasound transmission simulations (200 kHz to 30 MHz) showed the importance of the aspect ratio of the device and how there is a need for further studies on it. The development of such a technology could be of great use within the healthcare sector, not only due to its ability to provide highly accurate and varied real-time muscle data, but also because of the range of applications that could benefit from its use.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Moldovan, Alexandru and Zuo, Dr Siming and Cochran, Professor Sandy and Cerezo Sanchez, Ms Maria and Heidari, Professor Hadi
Authors: Cerezo Sanchez, M., Zuo, S., Moldovan, A., Cochran, S., Nazarpour, K., and Heidari, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
ISSN:2694-0604
ISBN:9781728111797
Published Online:09 December 2021
Copyright Holders:Copyright © 2021 Crown
First Published:First published in 2021 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC): 7373-7376
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
304896EPSRC-IAA: Early Stage Commercialisation of a PET Imaging Agent for the Detection of Cardiovascular Disease and CancerAndrew SutherlandEngineering and Physical Sciences Research Council (EPSRC)EP/R511705/1Chemistry