Forward-looking 30-MHz phased-array transducer for peripheral intravascular imaging
SCIE
SCOPUS
- Title
- Forward-looking 30-MHz phased-array transducer for peripheral intravascular imaging
- Authors
- Cabrera-Munoz, Nestor E.; Eliahoo, Payam; Wodnicki, Robert; Jung, Hayong; Chiu, Chi Tat; Williams, Jay A.; Kim, Hyung Ham; Zhou, Qifa; Shung, K. Kirk
- Date Issued
- 2018-09
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- This paper describes the design, fabrication, and testing of a forward-looking 30-MHz phased-array transducer for peripheral intravascular imaging. The array features 32 piezoelectric elements arranged in a linear 2-2 composite configuration dry etched into a piece of PMN-30%PT single crystal and separated by non-conductive epoxy kerfs at a 25-mu m pitch, yielding a total active aperture of 0.8 mm in the azimuth direction and 1.0 mm in the elevation direction, with an elevation natural focal depth of 5.0 mm. The array includes non-conductive epoxy backing and two front matching layers. A custom flexible circuit connects the array piezoelectric elements to a bundle of 32 individual 48-AWG micro-coaxial cables enclosed within a 0.6-m long 8 F catheter. Performance characterization was evaluated via finite element analysis simulations and afterwards compared to measured results, which showed an average center frequency of 28.9 MHz, an average bandwidth of 36.4% at -6 dB, and crosstalk less than -26.5 dB. Imaging of a tungsten fine-wire phantom resulted in axial and lateral spatial resolutions of approximately 65 mu m and 215 mu m, respectively. The imaging capability was further evaluated with a porcine carotid artery phantom, demonstrating the suitability of the proposed phased-array transducer for peripheral intravascular imaging. (C) 2018 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95657
- DOI
- 10.1016/j.sna.2018.07.035
- ISSN
- 0924-4247
- Article Type
- Article
- Citation
- SENSORS AND ACTUATORS A-PHYSICAL, vol. 280, page. 145 - 163, 2018-09
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