High-frequency (> 65 MHz) broadband transparent transducer with ultrathin gold electrode for dual-mode photoacoustic and laser-induced ultrasound microscopy

被引：0

作者：

Park, Sunghun ^{[1
,2
]}

Hong, Woongki ^{[1
,3
]}

Park, Hyeongyu ^{[1
]}

Lee, Eunji ^{[1
]}

Nam, Sangwoo ^{[4
]}

Jung, Jinhwan ^{[5
]}

Hyun, Jung Ho ^{[5
,6
,7
]}

Yu, Jaesok ^{[4
,7
,8
]}

Kang, Hongki ^{[1
,3
,9
,10
,11
]}

Chang, Jin Ho ^{[1
,7
]}

机构：

[1] DGIST Daegu Gyeongbuk Inst Sci & Technol, Dept Elect Engn & Comp Sci, Daegu 42988, South Korea

[2] KRISS Korea Res Inst Stand & Sci, Nondestruct Metrol Grp, Daejeon 34113, South Korea

[3] Seoul Natl Univ, Coll Engn, Interdisciplinary Program Bioengn, Seoul 08826, South Korea

[4] DGIST Daegu Gyeongbuk Inst Sci & Technol, Dept Robot & Mechatron Engn, Daegu 42988, South Korea

[5] DGIST Daegu Gyeongbuk Inst Sci & Technol, Dept Brain Sci, Daegu 42988, South Korea

[6] DGIST Daegu Gyeongbuk Inst Sci & Technol, Ctr Synapse Divers & Specif, Daegu 42988, South Korea

[7] DGIST Daegu Gyeongbuk Inst Sci & Technol, Biomed Sci & Engn Major Interdisciplinary Studies, Daegu 42988, South Korea

[8] DGIST Daegu Gyeongbuk Inst Sci & Technol, Artificial Intelligence Major Interdisciplinary St, Daegu 42988, South Korea

[9] Seoul Natl Univ, Dept Biomed Engn, Coll Med, Seoul 03080, South Korea

[10] Seoul Natl Univ, Inst Med & Biol Engn, Med Res Ctr, Seoul 03080, South Korea

[11] Seoul Natl Univ Hosp, Seoul 03080, South Korea

来源：

PHOTOACOUSTICS | 2025年 / 45卷

基金：

新加坡国家研究基金会;

关键词：

Transparent transducer; Photoacoustic microscopy; Combined photoacoustic and ultrasound imaging; Ultrathin gold electrode; ITO electrode;

D O I：

10.1016/j.pacs.2025.100751

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

For high-performance combined photoacoustic (PA) and Ultrasound (US) microscopy, precise coaxial alignment of the US and laser beams is essential. This can be realized using broadband transparent ultrasound transducers (TUTs). However, the current dual-mode imaging systems encounter significant challenges in simultaneous PA and US data acquisition due to sequential transmission of light and ultrasound and mechanical movement of dual-mode probes, leading to longer acquisition times and potential registration inaccuracies. To overcome these limitations, we propose a recently developed high-frequency broadband TUT with an ultrathin (< 10 nm) gold electrode, achieving a center frequency of 65.6 MHz and a -6 dB bandwidth of 71.6 %. The ultrathin gold electrode facilitates laser-induced ultrasound (LUS), enabling simultaneous acquisition of PA and US images. In vivo experiments demonstrate that LUS imaging can effectively replace conventional US imaging, offering highly efficient dual-mode PA/US imaging with minimized registration errors.

引用

页数：15

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