A PZT-PVDF stacked transducer for short-pulse ultrasound therapy and monitoring
Author(s)
Jiang, Zheng
Dickinson, Robert J
Hall, Timothy L
Choi, James J
Type
Journal Article
Abstract
Therapeutic ultrasound technologies using microbubbles require a feedback control system to perform the treatment in a safe and effective manner. Current feedback control technologies utilize the microbubble’s acoustic emissions to adjust the treatment acoustic parameters. Typical systems use two separated transducers: one for transmission and the other for reception. However, separating the transmitter and receiver leads to foci misalignment. This limitation could be resolved by arranging the transmitter and receiver in a stacked configuration. Taking advantage of an increasing number of short-pulse-based therapeutic methods, we have constructed a PZT-PVDF stacked transducer design that allows the transmission and reception of short-pulse ultrasound from the same location. Our design had a piston transmitter composed of a PZT disc (1 MHz, 12.7 mm in diameter), a backing layer, and two matching layers. A layer of Polyvinylidene fluoride (PVDF) (28 μm in thickness, 12.7 mm in diameter) was placed at the front surface of the transmitter for reception. Transmission and reception from the same location was demonstrated in pulse-echo experiments where PZT transmitted a pulse and both PZT and PVDF received the echo. The echo signal received by the PVDF was 0.43 μs shorter than the signal received by the PZT. Reception of broadband acoustic emissions using the PVDF was also demonstrated in experiments where microbubbles were exposed to ultrasound pulses. Thus, we have shown that our PZT-PVDF stack design has unique transmission and reception features that could be incorporated into a multi-element array design that improves focal superimposing, transmission efficiency, and reception sensitivity.
Date Issued
2021-02-16
Date Acceptance
2021-02-13
Citation
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021, 68 (6), pp.2164-2171
ISSN
0885-3010
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Start Page
2164
End Page
2171
Journal / Book Title
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume
68
Issue
6
Copyright Statement
© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.
Identifier
https://ieeexplore.ieee.org/document/9354791
Subjects
Acoustics
02 Physical Sciences
09 Engineering
Publication Status
Published
Date Publish Online
2021-02-16