Harput, S, Freear, S orcid.org/0000-0001-7858-4155, Gelat, P et al. (5 more authors) (2016) Coupling of wideband impulses generated by granular chains into liquids for biomedical applications. In: IEEE International Ultrasonics Symposium, IUS. 2016 International UItrasonics Symposium, 18-21 Sep 2016, Tours, France. IEEE ISBN 9781467398978
Abstract
An ultrasonic transducer technology to generate wideband impulses using a one-dimensional chain of spheres was previously presented. The Hertzian contact between the spheres causes the nonlinearity of the system to increase, which transforms high amplitude narrowband sinusoidal input into a train of wideband impulses. Generation of short duration ultrasonic pulses is desirable both in diagnostic and therapeutic ultrasound. Nevertheless, the biggest challenge in terms of adaptation to biomedical ultrasound is the coupling of the ultrasonic energy into biological tissue. An analytical model was created to address the coupling issue. Effect of the matching layer was modelled as a flexible thin plate clamped from the edges. Model was verified against hydrophone measurements. Different coupling materials, such as glass, aluminium, acrylic, silicon rubber, and vitreous carbon, was analysed with this model. Results showed that soft matching layers such as acrylic and rubber inhibit the generation of higher order harmonics. Between the hard matching materials, vitreous carbon achieved the best results due to its acoustic impedance.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, IEEE. This is an author produced version of a paper published in Ultrasonics Symposium (IUS), 2016 IEEE International. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Uploaded in accordance with the publisher’s self-archiving policy. |
Keywords: | Acoustics, Carbon, Analytical models, Couplings, Aluminum, Sonar equipment, Harmonic analysis |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Jan 2017 12:21 |
Last Modified: | 29 Jan 2018 14:36 |
Published Version: | https://doi.org/10.1109/ULTSYM.2016.7728481 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/ULTSYM.2016.7728481 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110198 |