Transparent Flexible Piezoelectric Ultrasound Transducer for Photoacoustic Imaging System

Liu, Ya-Han; Chen, Lixiang; Li, Chih–Ying; Lin, Fu-Sung; Su, Hsin-Yi; Tsai, Chi-Ting; Wang, Liwen; Wang, Yeong-Her; Huang, Chih-Hsien

doi:10.1109/jsen.2021.3135872

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…At present, there are three main methods to fabricate the core flexible active materials for flexible US transducers. First, fabricating flexible piezoelectric polymers directly to be used as active materials for flexible US transducers [ 25 , 26 ]. Second, attaching rigid piezoelectric material films on flexible substrates to form the active materials with certain flexibility [ 1 , 19 , 27 ].…”

Section: Advances In Functional Materials For Flexible Us Transducersmentioning

confidence: 99%

“…The PAI system with a flexible CMUT array showed an SNR of 46 dB with an axial and lateral resolution of 382 μm and 293 μm, respectively [ 15 ]. Liu et al used a single-element US transducer with a 6.7 MHz center frequency and 86.3% −3 dB fractional bandwidth in a PAI system, as shown in Figure 9 c [ 26 ]. The PAI system with a flexible US transducer also showed the capability and quality of evaluating the imaging depth and 3D imaging, which could image a 2 mm beam from a distance of 36 mm with a 0.94% error in the axial position and 1.66% in the lateral.…”

Section: Practical Imaging Applications With Flexible Us Transducersmentioning

confidence: 99%

“…( c ) Schematic of the PAI system with a flexible US transducer based on PVDF ( left ) and PA images of different objects from different perspectives ( middle and right ). Adapted from [ 26 ].…”

Section: Figurementioning

confidence: 99%

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Recent Advances in Flexible Ultrasonic Transducers: From Materials Optimization to Imaging Applications

Ren

Yin

et al. 2023

Micromachines

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Ultrasonic (US) transducers have been widely used in the field of ultrasonic and photoacoustic imaging system in recent years, to convert acoustic and electrical signals into each other. As the core part of imaging systems, US transducers have been extensively studied and achieved remarkable progress recently. Imaging systems employing conventional rigid US transducers impose certain constraints, such as not being able to conform to complex surfaces and comfortably come into contact with skin and the sample, and meet the applications of continuous monitoring and diagnosis. To overcome these drawbacks, significant effort has been made in transforming the rigid US transducers to become flexible and wearable. Flexible US transducers ensure self-alignment to complex surfaces and maximize the transferred US energy, resulting in high quality detection performance. The advancement in flexible US transducers has further extended the application range of imaging systems. This review is intended to summarize the most recent advances in flexible US transducers, including advanced functional materials optimization, representative US transducers designs and practical applications in imaging systems. Additionally, the potential challenges and future directions of the development of flexible US transducers are also discussed.

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Section: Advances In Functional Materials For Flexible Us Transducersmentioning

confidence: 99%

Section: Practical Imaging Applications With Flexible Us Transducersmentioning

confidence: 99%

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Recent Advances in Flexible Ultrasonic Transducers: From Materials Optimization to Imaging Applications

Ren

Yin

et al. 2023

Micromachines

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“…Fabricating sensors on transparent substrates is another important theme. 74 – 77 Transparent sensors enable co-axial or trans-illumination optical delivery, which is critical for some implementations such as handheld probes. They also facilitate multimodal imaging, allowing for flexible ultrasound detector integration with other optical modalities.…”

Section: Pa Plus Advanced Ultrasound Sensorsmentioning

confidence: 99%

Photoacoustic imaging plus X: a review

Jiang,

Zhu,

Tong

et al. 2023

J. Biomed. Opt.

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. Significance Photoacoustic (PA) imaging (PAI) represents an emerging modality within the realm of biomedical imaging technology. It seamlessly blends the wealth of optical contrast with the remarkable depth of penetration offered by ultrasound. These distinctive features of PAI hold tremendous potential for various applications, including early cancer detection, functional imaging, hybrid imaging, monitoring ablation therapy, and providing guidance during surgical procedures. The synergy between PAI and other cutting-edge technologies not only enhances its capabilities but also propels it toward broader clinical applicability. Aim The integration of PAI with advanced technology for PA signal detection, signal processing, image reconstruction, hybrid imaging, and clinical applications has significantly bolstered the capabilities of PAI. This review endeavor contributes to a deeper comprehension of how the synergy between PAI and other advanced technologies can lead to improved applications. Approach An examination of the evolving research frontiers in PAI, integrated with other advanced technologies, reveals six key categories named “PAI plus X.” These categories encompass a range of topics, including but not limited to PAI plus treatment, PAI plus circuits design, PAI plus accurate positioning system, PAI plus fast scanning systems, PAI plus ultrasound sensors, PAI plus advanced laser sources, PAI plus deep learning, and PAI plus other imaging modalities. Results After conducting a comprehensive review of the existing literature and research on PAI integrated with other technologies, various proposals have emerged to advance the development of PAI plus X. These proposals aim to enhance system hardware, improve imaging quality, and address clinical challenges effectively. Conclusions The progression of innovative and sophisticated approaches within each category of PAI plus X is positioned to drive significant advancements in both the development of PAI technology and its clinical applications. Furthermore, PAI not only has the potential to integrate with the above-mentioned technologies but also to broaden its applications even further.

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An Emerging Era: Conformable Ultrasound Electronics

Zhang,

Du,

Kim

et al. 2023

Advanced Materials

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Conformable electronics are regarded as the next generation of personal healthcare monitoring and remote diagnosis devices. In recent years, piezoelectric based conformable ultrasound electronics (cUSE) have been intensively studied due to their unique capabilities, including no‐radiative monitoring, soft tissue imaging, deep signal decoding, wireless power transfer, portability, and compatibility. This review provides a comprehensive understanding of cUSE for use in biomedical and healthcare monitoring systems and a summary of their recent advancements. Following an introduction to the fundamentals of piezoelectrics and ultrasound transducers, the critical parameters for transducer design are discussed. Next, five types of cUSE with their advantages and limitations are highlighted, and the fabrication of cUSE using advanced technologies is discussed. In addition, the working function, acoustic performance, and accomplishments in various applications are thoroughly summarized. We note that application considerations must be given to the tradeoffs between material selection, manufacturing processes, acoustic performance, mechanical integrity, and the entire integrated system. Finally, we highlight current challenges and directions for the development of cUSE, and provide research flow as the roadmap for future research. In conclusion, these advances in the fields of piezoelectric materials, ultrasound transducers, and conformable electronics spark an emerging era of biomedicine and personal healthcare.This article is protected by copyright. All rights reserved

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Transparent Flexible Piezoelectric Ultrasound Transducer for Photoacoustic Imaging System

Cited by 9 publications

References 24 publications

Recent Advances in Flexible Ultrasonic Transducers: From Materials Optimization to Imaging Applications

Recent Advances in Flexible Ultrasonic Transducers: From Materials Optimization to Imaging Applications

Photoacoustic imaging plus X: a review

An Emerging Era: Conformable Ultrasound Electronics

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