Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27526
Title: Focused intravascular ultrasonic probe using dimpled transducer elements
Authors: Chen, Y
Qiu, WB
Lam, KH
Liu, BQ
Jiang, XP
Zheng, HR
Luo, HS
Chan, HLW 
Dai, JY 
Keywords: Dimple technique
Intravascular ultrasound
Lead-free ceramic
PMN-PT single crystal
Issue Date: 2014
Publisher: Elsevier
Source: Ultrasonics, 2015, v. 56, p. 227-231 How to cite?
Journal: Ultrasonics 
Abstract: High-frequency focused intravascular ultrasonic probes were fabricated in this study using dimple technique based on PMN-PT single crystal and lead-free KNN-KBT-Mn ceramic. The center frequency, bandwidth, and insertion loss of the PMN-PT transducer were 34. MHz, 75%, and 22.9. dB, respectively. For the lead-free probe, the center frequency, bandwidth, and insertion loss were found to be 40. MHz, 72%, and 28.8. dB, respectively. The ultrasonic images of wire phantom and vessels with good resolution were obtained to evaluate the transducer performance. The -6. dB axial and lateral resolutions of the PMN-PT probe were determined to be 58. £gm and 131. £gm, respectively. For the lead-free probe, the axial and lateral resolutions were found to be 44. £gm and 125. £gm, respectively. These results suggest that the mechanical dimpling technique has good potential in preparing focused transducers for intravascular ultrasound applications.
URI: http://hdl.handle.net/10397/27526
ISSN: 0041-624X
EISSN: 1874-9968
DOI: 10.1016/j.ultras.2014.07.011
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