Single-Shot Near-Field Volumetric Imaging System for Optical Ultrasound and Photoacoustics Using Capacitive Micromachined Ultrasonic Transducer Without Transmission Mode
- Authors
- Choi, Won Young; Kwon, Soo Won; Kim, Young Hun; Kang, Ki Chang; Park, Kwan Kyu
- Issue Date
- Jun-2020
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Dual-mode imaging; near-field imaging; photoacoustic (PA); single shot; ultrasound (US) imaging
- Citation
- IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, v.67, no.6, pp.1151 - 1158
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
- Volume
- 67
- Number
- 6
- Start Page
- 1151
- End Page
- 1158
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/9751
- DOI
- 10.1109/TUFFC.2020.2965600
- ISSN
- 0885-3010
- Abstract
- In this article, we present a single-shot dual-mode imaging system that uses optical ultrasound (US) as an ultrasonic pulser without a transmission circuit. The ultrasonic pulse-echo system comprises an optical US pulser generated by carbon nanotubes (CNTs), which generate a high-power photoacoustic (PA) signal and a capacitive micromachined ultrasonic transducer (CMUT) receiver. By fabricating a thin CNT-polydimethylsiloxane (PDMS) composite capable of semiabsorption of the laser, a single-shot imaging system was developed. By transmitting a semipenetration light to the object, US and PA imaging were performed in a single shot. A CNT thickness of <1 mu m produced a maximum pressure of 154 kPa, and US was received by CMUT with a 2-MHz center frequency in PDMS. Additionally, a low-profile and near-depth imaging system was constructed with an intermediate layer of the 6-mm PDMS for the dry contact method. We performed a single-shotdual-mode imaging experimenton point and line phantoms, as well as the particle spread in the soft tissue. Thus, we examined the feasibility of the near-depth and single-shot dual-mode (US and PA) imaging system capable of a dry contact.
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