Body Conformal Linear Ultrasound Array for Combined Ultrasound and Photoacoustic Imaging

Roy, Kaustav; Agrawal, Sumit; Dangi, Ajay; Liu, Tianning; Chen, Haoyang; Jackson, Thomas N.; Pratap, Rudra; Kothapalli, Sri Rajasekhar

doi:10.1109/ius46767.2020.9251458

Cited by 16 publications

(10 citation statements)

References 23 publications

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“…Liu et al reported 9.5 MHz 1−D linear flexible PZT-based US transducer units on the PI substrates, which consisted of 32 transducer units [ 16 ]. The photograph picture and the performance of the 1−D array are displayed in Figure 4 b. Roy et al fabricated a 50−element 1−D linear flexible US array by using PZT as the active material, epoxy as the matching layer and flexible substrate, conductive epoxy as the binder for PZT and flexible substrate [ 55 ]. Schematics, photographs and performances of the flexible US transducer are shown in Figure 4 c [ 55 ].…”

Section: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

“…The photograph picture and the performance of the 1−D array are displayed in Figure 4 b. Roy et al fabricated a 50−element 1−D linear flexible US array by using PZT as the active material, epoxy as the matching layer and flexible substrate, conductive epoxy as the binder for PZT and flexible substrate [ 55 ]. Schematics, photographs and performances of the flexible US transducer are shown in Figure 4 c [ 55 ]. The 1−D linear flexible array US transducers are often used for inspection of target tissues with concave, convex or tubular shapes.…”

Section: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

“…( c ) Fabrication process ( top left ), 3D schematic ( top second ), optical images ( top right ) and performances ( bottom left, second and right ) of a flexible 1−D array, a flexible 1−D array with flexible PCB ( top third ) and experimental setup used for the obtained PA signals from pencil lead ( bottom third ). Adapted from [ 55 ].…”

Section: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

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: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

Section: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

Section: Flexible Us Transducer Designs For Imaging Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

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

Ren

Yin

et al. 2023

Micromachines

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show abstract

“…With the advent of pulsed/modulated light sources, the field has further evolved, acting on the fluid contained in the microfluidic channel, producing sound [13][14][15][16][17][18][19][20][21] . This phenomenon of making sound from any object by illuminating it with pulsating light is called photoacoustics, which has several applications in diverse fields 22,23 . The electromagnetic properties of light in conjunction with the penetrability of sound have made it possible to penetrate deeper and obtain information that is functional to the target thus probed.…”

Section: Introductionmentioning

confidence: 99%

“…The electromagnetic properties of light in conjunction with the penetrability of sound have made it possible to penetrate deeper and obtain information that is functional to the target thus probed. Pulsed LEDs and MUTs [24][25][26][27][28][29][30][31][32][33][34][35][36][37] have revolutionized the field further, thereby creating wearable photoacoustic devices. In this work, we have fabricated piezoelectric micromachined ultrasound transducers (PMUTs) using functional thin-film piezoelectric material and the nanofabrication tools and have demonstrated their use as a photoacoustic receiver.…”

Section: Introductionmentioning

confidence: 99%

A PMUT based photoacoustic system as a microfluidic concentration detector

Roy

Shastri

Kumar

et al. 2022

Photons Plus Ultrasound: Imaging and Sensing 2022

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We report on the development of a novel piezo-MEMS based optofluidic platform to detect the concentration of various species dissolved in a fluid. This platform employs piezoelectric micromachined ultrasound transducers (PMUTs) to work as a photoacoustic receiver, receiving ultrasound from fluid targets present in microfluidic channels while illuminated with a nanosecond pulsed laser. We fabricate both the PMUTs and the microfluidic channels and subsequently use them for the experiment. We also show the capability of PMUTs as a general photoacoustic receiver and demonstrate its signal-to-noise characteristics (~31) and its wide fractional bandwidth (~73%).

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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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Body Conformal Linear Ultrasound Array for Combined Ultrasound and Photoacoustic Imaging

Cited by 16 publications

References 23 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

A PMUT based photoacoustic system as a microfluidic concentration detector

An Emerging Era: Conformable Ultrasound Electronics

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