Mr. Haoming Huo Profile

Haoming Huo

at Tsinghua Univ

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Proceedings Article | 9 October 2021 Presentation + Paper

Handheld photoacoustic imaging with an articulated arm for light delivery

Jianpan Gao, Handi Deng, Hanqing Duan, Haoming Huo, Yizhou Bai, Bin Luo, Cheng Ma

Proceedings Volume 11900, 119001B (2021) https://doi.org/10.1117/12.2602481

KEYWORDS: Imaging systems, Photoacoustic imaging, Optical fibers, Data acquisition, Tissue optics, Photoacoustic spectroscopy, Blood vessels

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Photoacoustic imaging (PAI, also called optoacoustic imaging) combines light excitation and ultrasound detection for deep-tissue imaging with light absorption contrast. PAI can map the distribution of endogenous chromophores such as oxy-hemoglobin, deoxy-hemoglobin, lipids, water, and melanin. PAI performs especially well for structural and functional imaging of blood vessels. Its centimeter-deep imaging depth and ultrasound-defined resolution make it well suited for clinical application, where systems employing a linear array ultrasound probe are most commonly used due to simplicity, flexibility, and easy integration with standard ultrasonic imaging. The existing linear array based imaging systems typically employ optical fiber bundles for light delivery, such a scheme enjoys mechanical flexibility, optical stability, and simple light coupling. However, major drawbacks associated with fiber illumination include suboptimal transmission efficiency and a lack of control of the illumination pattern. Articulated arms provide an alternative light delivery option which potentially offer high transmission efficiency, stable and flexible operation, and low cost. Despite its wide applications in cosmetology, articulated arms for light delivery were understudied in the PAI community. In this paper, we reported the fabrication and experimental evaluation of an articulated arm specifically designed for linear-array-based PAI. Without losing the flexibility provided by the linear probe. Moreover, the articulated arm can be equipped with spatial positioning devices to perform three-dimensional reconstructions.

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