Breast Transmission Ultrasound Tomography Based on Capacitive Micromachined Ultrasonic Transducer Linear Arrays

Pei, Yu; Zhang, Yu; Hu, Shumin; Wang, Wenwen; Li, Yifan; He, Changde; Zhang, Sai; Wang, Renxin; Zhang, Wendong; Zhang, Guojun

doi:10.1109/jsen.2021.3132632

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…Further interconnections reduction is achieved by employing fully programmable beamformers at the transmitter side and implementing time division multiplexing at the receiver side [84]. Finally, sound impedance image and sound speed image are fused in the ultrasound computed tomography (USCT) proposed in [90] in order to obtain more information. Acoustic impedance image can provide the edges information of breast tissues, which is helpful to locate the relative position of lesion tissue.…”

Section: Pmut and Cmut For Biomedical Applicationsmentioning

confidence: 99%

PMUT and CMUT Devices for Biomedical Applications: A Review

Moisello,

Novaresi,

Sarkar

et al. 2024

IEEE Access

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Piezoelectric Micromachined Ultrasonic Transducers (PMUT) and Capacitive Micromachined Ultrasonic Transducers (CMUT) have seen great developments in recent years, both in terms of performance and scope of applications within the biomedical ultrasound domain. This paper presents a review of the state-of-the-art of PMUT and CMUT technologies, focusing on their principle of operation, microfabrication techniques and use in different biomedical imaging and therapeutic applications. The advantages and drawbacks of PMUT and CMUT technologies in comparison with conventional bulk transducers are highlighted, the trade-offs among PMUTs and CMUTs are discussed, and their relevance in the current landscape of medical diagnostics and therapeutic uses is outlined, thus providing a clear overview of these promising technologies for the present and the next generation biomedical ultrasound applications.

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Section: Pmut and Cmut For Biomedical Applicationsmentioning

confidence: 99%

PMUT and CMUT Devices for Biomedical Applications: A Review

Moisello,

Novaresi,

Sarkar

et al. 2024

IEEE Access

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“…In the past two decades, capacitive micro-machined ultrasonic transducers (CMUTs), which are considered as the most promising alternatives to traditional piezoelectric transducers, 1,2 have been greatly developed in the medical field for applications such as medical ultrasound imaging, [3][4][5][6] high-intensity focused ultrasound (HIFU) for tumor treatment, 7,8 and intravascular ultrasound. 9 In view of the successful cases of CMUTs in medical applications, many scholars started to seek applications of CMUTs in the field of structural health monitoring (SHM).…”

Section: Introductionmentioning

confidence: 99%

FEM-based analysis on sensing out-of-plane displacements of low-order Lamb wave modes by CMUTs

Zhang

Wang

et al. 2022

Journal of Applied Physics

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It is well known that acoustic emission (AE) signals, generated by external impacts or damages such as crack initiation, mainly propagate in the form of Lamb waves in plate-like structures. In this work, MEMS-based resonant capacitive micro-machined ultrasonic transducers (CMUTs), which are designed for sensing out-of-plane displacements, have been verified by finite element method (FEM) modeling and theoretical analysis for their feasibility of detecting low-order Lamb waves (A0 and S0). First, combining the propagation theory of Lamb waves and the “spring-mass-damper” model of CMUTs, the out-of-plane sensing mechanism has been explained, together with the analytical expression of sensitivity. Then, simulations based on FEM have been carried out to show that the designed CMUTs are sensitive to out-of-plane displacements, while extremely insensitive to in-plane displacements. Meanwhile, a transient analysis has found the potential abilities of CMUTs for sensing A0 and S0 lamb waves. Besides, the sensing characteristics of CMUTs have also been investigated, including the influence of squeezed-film damping, the amplitude of the input signal, the cell number, and cell space. Finally, the ball drop impact is simulated to show the potential of identifying the location of the AE source by CMUTs. Our studies reveal the out-of-plane sensing behaviors of CMUTs for Lamb waves and may have the potential in promoting the miniaturization and integration of AE sensors.

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