An Ultra-Wideband Capacitive Micromachined Ultrasonic Transducer (CMUT) Array for Acoustic Angiography: Preliminary Results

Sanders, Jean L.; Biliroglu, Ali Onder; Newsome, Isabel G.; Adelegan, Oluwafemi J.; Yamaner, F. Yalcın; Dayton, Paul A.; Oralkan, Ömer

doi:10.1109/ius46767.2020.9251738

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Transparent CMUTs have not yet been demonstrated for deep tissue US and real-time dualmodality USPA imaging capabilities. Although CMUTs have unique advantages such as wide bandwidth and ease of fabrication in 1D and 2D arrays forms with different shapes, sizes, and frequencies, they require complex clean room fabrication processes, large bias voltages, and custom-developed integrated circuits for operation, leading to their incompatibility with current clinical ultrasound systems [10,[47][48][49]. All-optical photoacoustic detectors such as transparent optical ring resonators [50] and Fabry-Pérot etalons [51] have 2 BME Frontiers the ability to transmit light through them and into the tissue.…”

Section: Introductionmentioning

confidence: 99%

A Transparent Ultrasound Array for Real-Time Optical, Ultrasound, and Photoacoustic Imaging

et al. 2022

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Objective and Impact Statement. Simultaneous imaging of ultrasound and optical contrasts can help map structural, functional, and molecular biomarkers inside living subjects with high spatial resolution. There is a need to develop a platform to facilitate this multimodal imaging capability to improve diagnostic sensitivity and specificity. Introduction. Currently, combining ultrasound, photoacoustic, and optical imaging modalities is challenging because conventional ultrasound transducer arrays are optically opaque. As a result, complex geometries are used to coalign both optical and ultrasound waves in the same field of view. Methods. One elegant solution is to make the ultrasound transducer transparent to light. Here, we demonstrate a novel transparent ultrasound transducer (TUT) linear array fabricated using a transparent lithium niobate piezoelectric material for real-time multimodal imaging. Results. The TUT-array consists of 64 elements and centered at ~6 MHz frequency. We demonstrate a quad-mode ultrasound, Doppler ultrasound, photoacoustic, and fluorescence imaging in real-time using the TUT-array directly coupled to the tissue mimicking phantoms. Conclusion. The TUT-array successfully showed a multimodal imaging capability and has potential applications in diagnosing cancer, neurological, and vascular diseases, including image-guided endoscopy and wearable imaging.

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