Wong, C.-M., Chen, Y., Luo, H., Dai, J., Lam, K.-H. and Chan, H. L.-w. (2017) Development of a 20-MHz wide-bandwidth PMN-PT single crystal phased-array ultrasound transducer. Ultrasonics, 73, pp. 181-186. (doi: 10.1016/j.ultras.2016.09.012) (PMID:27664869)
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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 (d33 > 1000 pC/N) and electromechanical coupling (k33 > 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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Wong, C.-M., Chen, Y., Luo, H., Dai, J., Lam, K.-H., and Chan, H. L.-w. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Ultrasonics |
| Publisher: | Elsevier |
| ISSN: | 0041-624X |
| ISSN (Online): | 1874-9968 |
| Related URLs: |
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