NDLI: Low cross-talk kerfless annular array ultrasound transducers using 1–3 piezocomposites with pseudo-random pillars

Content Provider	IEEE Xplore Digital Library
Author	Hao-Chung Yang Chi Tat Chiu Hojong Choi Fan Zheng Changgeng Liu Weibao Qiu Hyung Ham Kim Shung, K.K.
Copyright Year	2012
Description	Author affiliation: Biomed. Eng., Hong Kong Polytech. Univ., Hong Kong, China (Weibao Qiu) \|\| Dept. of Biomed. Eng., Univ. of Southern California, Los Angeles, CA, USA (Hao-Chung Yang; Chi Tat Chiu; Hojong Choi; Fan Zheng; Changgeng Liu; Hyung Ham Kim; Shung, K.K.)
Abstract	This paper describes the design and fabrication of a high-frequency kerfless annular array transducer utilizing a novel 1-3 piezocomposite which was designed to reduce inter-element cross-talk. 1-3 piezocomposites have significant advantages over bulk piezoelectric materials and other types of piezocomposites; however, their benefits come at the expense of introducing more undesired interpillar resonances. At high frequencies, this is especially detrimental to kerfless annular array transducers. We have previously shown that this unwanted coupling effect (high inter-element crosstalk), can be further reduced by employing a pseudo-random pillar geometry. Utilizing the 1-3 composites with the pseudo-random pillars, a 40 MHz annular array transducer was fabricated. Each annular array was designed to have six equal-area elements and a center frequency of 40 MHz. The average center frequency estimated from the measured pulse-echo responses of array elements was 38.7 MHz and the -6 dB bandwidth was 51 %. The average insertion loss recorded was 23.1 dB, and the maximum combined crosstalk between the adjacent elements was less than -31 dB. These results demonstrate that the 1-3 piezocomposite with the pseudo-random pillars may be a better choice for fabricating enhanced high frequency linear array ultrasound transducers; especially when mechanical dicing is used.
Starting Page	1560
Ending Page	1563
File Size	738005
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0390
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency measurement Arrays Area measurement Ultrasonic variables measurement Bandwidth Pulse measurements Biomedical imaging Piezocomposite Pseudo-Random Annular Array Pillar Lateral Interference Cross-Talk
Content Type	Text
Resource Type	Article

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