Virtual acoustic detector arrays for all-optical ultrasound sensing

Zesheng Zheng; Ruochong Zhang; Renzhe Bi; Malini Olivo; Kaicheng Liang

doi:10.1117/12.2691578

12 March 2024 Virtual acoustic detector arrays for all-optical ultrasound sensing

Zesheng Zheng, Ruochong Zhang, Renzhe Bi, Malini Olivo, Kaicheng Liang

Proceedings Volume 12842, Photons Plus Ultrasound: Imaging and Sensing 2024; 1284211 (2024) https://doi.org/10.1117/12.2691578
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

We introduce a compact, non-contact multimodal imaging platform that integrates ultrasound (US) imaging, inclusive of photoacoustic (PA) detection, with optical coherence tomography (OCT). This integration is achieved through a novel virtual acoustic detector array (VADA) technique for all-optical US sensing, utilizing the temporal and spatial resolving capabilities of swept-source optical interferometry. The technique extracts US signals from the phase time evolution of a swept-source OCT's spectral sweep. It enables the virtual construction of the VADA along both lateral and depth directions on the imaging target for non-contact detection of acoustic waves from surrounding US sources. The platform's high-speed scanning (MHz OCT A-scan rate) and ultra-sensitive phase detection (nm displacement sensitivity) allow for the customization of the spatial density of the VADA and the collection of wideband acoustic signals, which are essential for the reconstruction of US images. In our pilot study, we successfully demonstrated the feasibility of this technique. We used a conventional US transducer as an acoustic source. The acoustic field distribution within the imaging target and the morphology and position of the piezoelectric layer were successfully reconstructed, which is based on US waveforms obtained from the VADA.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zesheng Zheng, Ruochong Zhang, Renzhe Bi, Malini Olivo, and Kaicheng Liang "Virtual acoustic detector arrays for all-optical ultrasound sensing", Proc. SPIE 12842, Photons Plus Ultrasound: Imaging and Sensing 2024, 1284211 (12 March 2024); https://doi.org/10.1117/12.2691578

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