Experimental Investigation of the Effect of Subdicing on an Ultrasound Matrix Transducer

Santos, Djalma Simões dos; Fool, Fabian; Kim, Tae-Hoon; Noothout, Emile; Vos, Hendrik J.; Bosch, Johan G.; Pertijs, Michiel A. P.; Verweij, Martin D.; Jong, Nico de

doi:10.1109/ius52206.2021.9593315

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Based on the measured peak pressure (0.6 kPa) and the transmit voltage (20 V peak amplitude), we estimate an average transmit efficiency of approximately 30 Pa/V at 200 mm. This value is comparable with our previous prototype with subdiced elements [44]. On average, the elements have a center frequency of 7.5 MHz and a −6 dB single-way bandwidth of about 45%.…”

Section: Discussionsupporting

confidence: 87%

“…Instead, unwanted vibration modes will be generated, which significantly reduce the efficiency of the transducer [42,43]. Fortunately, the performance of elements having a width greater than 0.7 λ can be improved by subdicing the elements, as we have previously investigated through simulations [43] and experiments [44]. With the proposed pitch of 300 μm in the y-direction, only 120 TX and 120 RX channels are necessary, which satisfies our requirements.…”

Section: Design Choicesmentioning

confidence: 73%

“…In our previous work [44], in which we investigated the effect of subdicing on a PZT matrix built on top of ASICs, we limited ourselves to the fabrication of a matrix transducer consisting of 4 × 1 tiled ASICs. The main difficulty lay in maintaining a flat surface of the stack over the whole area.…”

Section: Stack Fabricationmentioning

confidence: 99%

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A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery

Santos

Fool

Mozaffarzadeh

et al. 2022

Sensors

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High frame rate three-dimensional (3D) ultrasound imaging would offer excellent possibilities for the accurate assessment of carotid artery diseases. This calls for a matrix transducer with a large aperture and a vast number of elements. Such a matrix transducer should be interfaced with an application-specific integrated circuit (ASIC) for channel reduction. However, the fabrication of such a transducer integrated with one very large ASIC is very challenging and expensive. In this study, we develop a prototype matrix transducer mounted on top of multiple identical ASICs in a tiled configuration. The matrix was designed to have 7680 piezoelectric elements with a pitch of 300 μm × 150 μm integrated with an array of 8 × 1 tiled ASICs. The performance of the prototype is characterized by a series of measurements. The transducer exhibits a uniform behavior with the majority of the elements working within the −6 dB sensitivity range. In transmit, the individual elements show a center frequency of 7.5 MHz, a −6 dB bandwidth of 45%, and a transmit efficiency of 30 Pa/V at 200 mm. In receive, the dynamic range is 81 dB, and the minimum detectable pressure is 60 Pa per element. To demonstrate the imaging capabilities, we acquired 3D images using a commercial wire phantom.

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Section: Discussionsupporting

confidence: 87%

Section: Design Choicesmentioning

confidence: 73%

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A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery

Santos

Fool

Mozaffarzadeh

et al. 2022

Sensors

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Simulation and experimental investigation of the effects of subdicing on a single element transducer

Li,

Shao,

et al. 2024

Applied Acoustics

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Automated Characterization of Matrix Transducer Arrays using the Verasonics Imaging System

Santos

Fool

Kim

et al. 2022

2022 IEEE International Ultrasonics Symposium (IUS)

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Over the past decades, ultrasound imaging has made considerable progress based on the advancement of imaging systems as well as transducer technology. With the need for advanced transducer arrays with complex designs and technical requirements, there is also a need for suitable tools to characterize such transducers. However, despite the importance of acoustic characterization to assess the performance of novel transducer arrays, the characterization process of highly complex transducers might involve various manual steps, which are laborious, time-consuming, and subject to errors. These factors can hinder the full characterization of a prototype transducer, leading to an under-representation or inadequate evaluation. To come to an extensive, high-quality evaluation of a prototype transducer, the acoustic characterization of each transducer element is indispensable in both transmit and receive operations. In this paper, we propose a pipeline to automatically perform the acoustic characterization of a matrix transducer using a research imaging system. The performance of the pipeline is tested on a prototype matrix transducer consisting of 960 elements. The results show that the proposed pipeline is capable of performing the complete acoustic characterization of a high-element count transducer in a fast and convenient way.

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Experimental Investigation of the Effect of Subdicing on an Ultrasound Matrix Transducer

Cited by 3 publications

References 12 publications

A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery

A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery

Simulation and experimental investigation of the effects of subdicing on a single element transducer

Automated Characterization of Matrix Transducer Arrays using the Verasonics Imaging System

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