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http://hdl.handle.net/10397/66406
Title: | Development of a 20-MHz wide-bandwidth PMN-PT single crystal phased-array ultrasound transducer | Authors: | Wong, CM Chen, Y Luo, HS Dai, JY Lam, KH Chan, HLW |
Issue Date: | Jan-2017 | Source: | Ultrasonics, Jan. 2017, v. 73, p. 181-186 | Abstract: | In this study, a 20-MHz 64-element phased-array ultrasound transducer with a one-wavelength pitch is developed using a PMN-30%PT single crystal and double-matching layer scheme. High piezoelectric (d(33) > 1000 pC/N) and electromechanical coupling (k(33) > 0.8) properties of the single crystal with an optimized fabrication process involving the photolithography technique have been demonstrated to be suitable for wide-bandwidth (>= 70%) and high-sensitivity (insertion loss <= 30 dB) phased-array transducer application. A -6 dB bandwidth of 91% and an insertion loss of 29 dB for the 20-MHz 64-element phased-array transducer were achieved. This result shows that the bandwidth is improved comparing with the investigated high-frequency (>= 20 MHz) ultrasound transducers using piezoelectric ceramic and single crystal materials. It shows that this phased-array transducer has potential to improve the resolution of biomedical imaging, theoretically. Based on the hypothesis of resolution improvement, this phased-array transducer is capable for small animal (i.e. mouse and zebrafish) studies. | Keywords: | PMN-PT single crystal High-frequency phased-array Ultrasound transducer |
Publisher: | Elsevier | Journal: | Ultrasonics | ISSN: | 0041-624X | EISSN: | 1874-9968 | DOI: | 10.1016/j.ultras.2016.09.012 | Rights: | © 2016 Elsevier B.V. All rights reserved. © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Wong, C. M., Chen, Y., Luo, H., Dai, J., Lam, K. H., & Chan, H. L. W. (2017). Development of a 20-MHz wide-bandwidth PMN-PT single crystal phased-array ultrasound transducer. Ultrasonics, 73, 181-186 is available at https://doi.org/10.1016/j.ultras.2016.09.012. |
Appears in Collections: | Journal/Magazine Article |
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Wong_Development_20-Mhz_Wide-Bandwidth.pdf | Pre-Published version | 1.39 MB | Adobe PDF | View/Open |
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