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Literatura académica sobre el tema "CMUT arrays"

Autor: Grafiati
Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "CMUT arrays"

1

Wang, Ziyuan, Changde He, Wendong Zhang, et al. "Fabrication of 2-D Capacitive Micromachined Ultrasonic Transducer (CMUT) Array through Silicon Wafer Bonding." Micromachines 13, no. 1 (2022): 99. http://dx.doi.org/10.3390/mi13010099.

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Capacitive micromachined ultrasound transducers (CMUTs) have broad application prospects in medical imaging, flow monitoring, and nondestructive testing. CMUT arrays are limited by their fabrication process, which seriously restricts their further development and application. In this paper, a vacuum-sealed device for medical applications is introduced, which has the advantages of simple manufacturing process, no static friction, repeatability, and high reliability. The CMUT array suitable for medical imaging frequency band was fabricated by a silicon wafer bonding technology, and the adjacent array devices were isolated by an isolation slot, which was cut through the silicon film. The CMUT device fabricated following this process is a 4 × 16 array with a single element size of 1 mm × 1 mm. Device performance tests were conducted, where the center frequency of the transducer was 3.8 MHz, and the 6 dB fractional bandwidth was 110%. The static capacitance (29.4 pF) and center frequency (3.78 MHz) of each element of the array were tested, and the results revealed that the array has good consistency. Moreover, the transmitting and receiving performance of the transducer was evaluated by acoustic tests, and the receiving sensitivity was −211 dB @ 3 MHz, −213 dB @ 4 MHz. Finally, reflection imaging was performed using the array, which provides certain technical support for the research of two-dimensional CMUT arrays in the field of 3D ultrasound imaging.
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2

Yashvanth, Varshitha, and Sazzadur Chowdhury. "An Investigation of Silica Aerogel to Reduce Acoustic Crosstalk in CMUT Arrays." Sensors 21, no. 4 (2021): 1459. http://dx.doi.org/10.3390/s21041459.

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This paper presents a novel technique to reduce acoustic crosstalk in capacitive micromachined ultrasonic transducer (CMUT) arrays. The technique involves fabricating a thin layer of diisocyanate enhanced silica aerogel on the top surface of a CMUT array. The silica aerogel layer introduces a highly nanoporous permeable layer to reduce the intensity of the Scholte wave at the CMUT-fluid interface. 3D finite element analysis (FEA) simulation in COMSOL shows that the developed technique can provide a 31.5% improvement in crosstalk reduction for the first neighboring element in a 7.5 MHz CMUT array. The average improvement of crosstalk level over the −6 dB fractional bandwidth was 22.1%, which is approximately 5 dB lower than that without an aerogel layer. The results are in excellent agreement with published experimental results to validate the efficacy of the new technique.
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3

Atalar, Abdullah, Hayrettin Köymen, and H. Kaan Oğuz. "Rayleigh–bloch waves in CMUT arrays." IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 61, no. 12 (2014): 2139–48. http://dx.doi.org/10.1109/tuffc.2014.006610.

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Demirci, U., A. S. Ergun, O. Oralkan, M. Karaman, and B. T. Khuri-Yakub. "Forward-viewing CMUT arrays for medical imaging." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 51, no. 7 (2004): 887–95. http://dx.doi.org/10.1109/tuffc.2004.1320749.

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5

Oralkan, O., A. S. Ergun, Ching-Hsiang Cheng, et al. "Volumetric ultrasound imaging using 2-D CMUT arrays." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 50, no. 11 (2003): 1581–94. http://dx.doi.org/10.1109/tuffc.2003.1251142.

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6

Caronti, Alessandro, G. Caliano, R. Carotenuto, et al. "Capacitive micromachined ultrasonic transducer (CMUT) arrays for medical imaging." Microelectronics Journal 37, no. 8 (2006): 770–77. http://dx.doi.org/10.1016/j.mejo.2005.10.012.

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7

Pei, Yu, Guojun Zhang, Yu Zhang, and Wendong Zhang. "Breast Acoustic Parameter Reconstruction Method Based on Capacitive Micromachined Ultrasonic Transducer Array." Micromachines 12, no. 8 (2021): 963. http://dx.doi.org/10.3390/mi12080963.

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Ultrasound computed tomography (USCT) systems based on capacitive micromachined ultrasonic transducer (CMUT) arrays have a wide range of application prospects. For this paper, a high-precision image reconstruction method based on the propagation path of ultrasound in breast tissue are designed for the CMUT ring array; that is, time-reversal algorithms and FBP algorithms are respectively used to reconstruct sound speed distribution and acoustic attenuation distribution. The feasibility of this reconstruction method is verified by numerical simulation and breast model experiments. According to reconstruction results, sound speed distribution reconstruction deviation can be reduced by 53.15% through a time-reversal algorithm based on wave propagation theory. The attenuation coefficient distribution reconstruction deviation can be reduced by 61.53% through FBP based on ray propagation theory. The research results in this paper will provide key technological support for a new generation of ultrasound computed tomography systems.
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8

Oguz, H. Kagan, A. Atalar, and H. Koymen. "Equivalent circuit-based analysis of CMUT cell dynamics in arrays." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 60, no. 5 (2013): 1016–24. http://dx.doi.org/10.1109/tuffc.2013.2660.

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9

Satir, Sarp, and F. Levent Degertekin. "A nonlinear lumped model for ultrasound systems using CMUT arrays." IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 62, no. 10 (2015): 1865–79. http://dx.doi.org/10.1109/tuffc.2015.007145.

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10

Jung, Gwangrok, Coskun Tekes, Amirabbas Pirouz, F. Levent Degertekin, and Maysam Ghovanloo. "Supply-Doubled Pulse-Shaping High Voltage Pulser for CMUT Arrays." IEEE Transactions on Circuits and Systems II: Express Briefs 65, no. 3 (2018): 306–10. http://dx.doi.org/10.1109/tcsii.2017.2691676.

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