Transparent ultrasonic transducers based on relaxor ferroelectric crystals for advanced photoacoustic imaging
Chaorui Qiu,
Zhiqiang Zhang,
Zhiqiang Xu,
Liao Qiao,
Li Ning,
Shujun Zhang,
Min Su,
Weichang Wu,
Kexin Song,
Zhuo Xu,
Long-Qing Chen,
Hairong Zheng (hr.zheng@siat.ac.cn),
Chengbo Liu (cb.liu@siat.ac.cn),
Weibao Qiu (wb.qiu@siat.ac.cn) and
Fei Li (ful5@xjtu.edu.cn)
Additional contact information
Chaorui Qiu: Xi’an Jiaotong University
Zhiqiang Zhang: Chinese Academy of Sciences
Zhiqiang Xu: Chinese Academy of Sciences
Liao Qiao: Xi’an Jiaotong University
Li Ning: Xi’an Jiaotong University
Shujun Zhang: University of Wollongong
Min Su: Chinese Academy of Sciences
Weichang Wu: Chinese Academy of Sciences
Kexin Song: Xi’an Jiaotong University
Zhuo Xu: Xi’an Jiaotong University
Long-Qing Chen: The Pennsylvania State University
Hairong Zheng: Chinese Academy of Sciences
Chengbo Liu: Chinese Academy of Sciences
Weibao Qiu: Chinese Academy of Sciences
Fei Li: Xi’an Jiaotong University
Nature Communications, 2024, vol. 15, issue 1, 1-14
Abstract:
Abstract Photoacoustic imaging is a promising non-invasive functional imaging modality for fundamental research and clinical diagnosis. However, achieving capillary-level resolution, wide field-of-view, and high frame rates remains challenging. To address this, we propose a transparent ultrasonic transducer design using our developed transparent Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals. Our fabrication technique incorporates quartz-glass-and-epoxy matching layers with low-resistance indium-tin-oxide electrodes through a brass-ring based structure, enabling a high frequency (28.5 MHz), wide bandwidth (78%), and enhanced pulse-echo sensitivity (2.5 V under 2-μJ pulse excitation). Our Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3-based transparent ultrasonic transducer demonstrates a four-fold enhancement in photoacoustic detection sensitivity when compared to the LiNbO3-based counterpart, leading to a 13 dB improvement of signal-to-noise ratio in microvascular photoacoustic imaging. This enables dynamic monitoring of mouse cerebral cortex microvasculature during seizures at 0.8 Hz frame rates over a 1.5 × 1.5 mm2 field-of-view. Our work paves the way for high-performance and compact photoacoustic imaging systems using advanced piezoelectric materials.
Date: 2024
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DOI: 10.1038/s41467-024-55032-0
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