PMN-PT Single Crystal Ultrasonic Transducer With Half-Concave Geometric Design for IVUS Imaging

Fei, Chunlong; Yang, Yaoheng; Guo, Feifei; Peng, Lin; Chen, Qiang; Zhou, Qifa; Sun, Lei

doi:10.1109/tbme.2017.2784437

Cited by 42 publications

(14 citation statements)

References 37 publications

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“…Another commonly used method to improve transducer resolution is to develop a focal geometry. Fei et al [82] developed a 35 MHz IVUS transducer with a half-concave structure using PMN-PT single crystal. The 1.2 mm × 1.2 mm transducer showed a −6 dB bandwidth of 54%, and axial and lateral resolutions of 34.5 µm and 392 µm, respectively.…”

Section: Conventional Piezoelectric Ivus Transducermentioning

confidence: 99%

Recent Advances in Transducers for Intravascular Ultrasound (IVUS) Imaging

Peng

Kim

et al. 2021

Sensors

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As a well-known medical imaging methodology, intravascular ultrasound (IVUS) imaging plays a critical role in diagnosis, treatment guidance and post-treatment assessment of coronary artery diseases. By cannulating a miniature ultrasound transducer mounted catheter into an artery, the vessel lumen opening, vessel wall morphology and other associated blood and vessel properties can be precisely assessed in IVUS imaging. Ultrasound transducer, as the key component of an IVUS system, is critical in determining the IVUS imaging performance. In recent years, a wide range of achievements in ultrasound transducers have been reported for IVUS imaging applications. Herein, a comprehensive review is given on recent advances in ultrasound transducers for IVUS imaging. Firstly, a fundamental understanding of IVUS imaging principle, evaluation parameters and IVUS catheter are summarized. Secondly, three different types of ultrasound transducers (piezoelectric ultrasound transducer, piezoelectric micromachined ultrasound transducer and capacitive micromachined ultrasound transducer) for IVUS imaging are presented. Particularly, the recent advances in piezoelectric ultrasound transducer for IVUS imaging are extensively examined according to their different working mechanisms, configurations and materials adopted. Thirdly, IVUS-based multimodality intravascular imaging of atherosclerotic plaque is discussed. Finally, summary and perspectives on the future studies are highlighted for IVUS imaging applications.

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Section: Conventional Piezoelectric Ivus Transducermentioning

confidence: 99%

Recent Advances in Transducers for Intravascular Ultrasound (IVUS) Imaging

Peng

Kim

et al. 2021

Sensors

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“…The fabricated PMN-PT pMUT had a chip size of 1.5 mm × 1.5 mm; its cross-sectional view is shown in Figure 9 b. In 2017, by lapping and mechanically dimpling single-crystal PMN-PT, Fei et al fabricated a 35 MHz half-concave-shaped focused pMUT for intravascular ultrasound imaging applications [ 101 ]. Owing to the dimpling process, the thickness changes continuously along the curved surface, leading to multiple resonances around the center frequency, thus resulting in an improved −6 dB bandwidth of 54% compared to 28% for a flat PMN-PT pMUT fabricated using the same process.…”

Section: Pmuts and Their Endoscopic Pai Applicationsmentioning

confidence: 99%

MEMS Ultrasound Transducers for Endoscopic Photoacoustic Imaging Applications

Wang

Yang

et al. 2020

Micromachines

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Photoacoustic imaging (PAI) is drawing extensive attention and gaining rapid development as an emerging biomedical imaging technology because of its high spatial resolution, large imaging depth, and rich optical contrast. PAI has great potential applications in endoscopy, but the progress of endoscopic PAI was hindered by the challenges of manufacturing and assembling miniature imaging components. Over the last decade, microelectromechanical systems (MEMS) technology has greatly facilitated the development of photoacoustic endoscopes and extended the realm of applicability of the PAI. As the key component of photoacoustic endoscopes, micromachined ultrasound transducers (MUTs), including piezoelectric MUTs (pMUTs) and capacitive MUTs (cMUTs), have been developed and explored for endoscopic PAI applications. In this article, the recent progress of pMUTs (thickness extension mode and flexural vibration mode) and cMUTs are reviewed and discussed with their applications in endoscopic PAI. Current PAI endoscopes based on pMUTs and cMUTs are also introduced and compared. Finally, the remaining challenges and future directions of MEMS ultrasound transducers for endoscopic PAI applications are given.

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“…As the key component of ultrasonic transducer, certain piezoelectric materials including lead zirconate titanate (PZT) [21,22,23,24], lead niobiumzine zirconate titanate (PMN-PT) crystal [1,21,22,25,26,27], lithium niobate (LiNbO 3 ) single crystal [2,3,13,28,29], zinc oxide (ZnO) [12,28], and polyvinylidene fluoride (PVDF) film [3,5,6,9,30] have been extensively investigated and reported. The interesting properties of these piezoelectric materials including electromechanical coupling coefficient, acoustic impedance, dielectric constants, piezoelectric coefficients, and sound velocity have also been reported.…”

Section: Design and Fabrication Of Multifocal Point Transducersmentioning

confidence: 99%

Design, Fabrication, and Evaluation of Multifocal Point Transducer for High-Frequency Ultrasound Applications

Nguyen

Truong

Bui

et al. 2019

Sensors

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The present study illustrates the design, fabrication, and evaluation of a novel multifocal point (MFP) transducer based on polyvinylidene fluoride (PVDF) film for high-frequency ultrasound application. The fabricated MFP surface was press-focused using a computer numerical control (CNC) machining tool-customized multi-spherical pattern object. The multi-spherical pattern has five spherical surfaces with equal area and connected continuously to have the same energy level at focal points. Center points of these spheres are distributed in a linear pattern with 1 mm distance between each two points. The radius of these spheres increases steadily from 10 mm to 13.86 mm. The designed MFP transducer had a center frequency of 50 MHz and a −6 dB bandwidth of 68%. The wire phantom test was conducted to study and demonstrate the advantages of this novel design. The obtained results for MFP transducer revealed a significant increase (4.3 mm) of total focal zone in the near-field and far-field area compared with 0.48 mm obtained using the conventional single focal point transducer. Hence, the proposed method is promising to fabricate MFP transducers for deeper imaging depth applications.

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PMN-PT Single Crystal Ultrasonic Transducer With Half-Concave Geometric Design for IVUS Imaging

Cited by 42 publications

References 37 publications

Recent Advances in Transducers for Intravascular Ultrasound (IVUS) Imaging

Recent Advances in Transducers for Intravascular Ultrasound (IVUS) Imaging

MEMS Ultrasound Transducers for Endoscopic Photoacoustic Imaging Applications

Design, Fabrication, and Evaluation of Multifocal Point Transducer for High-Frequency Ultrasound Applications

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