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Na Huang

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Proceedings Article | 31 October 2016 Paper

Whole-body and multispectral photoacoustic imaging of adult zebrafish

Na Huang, Lei Xi

Proceedings Volume 10024, 100243U (2016) https://doi.org/10.1117/12.2246202

KEYWORDS: Photoacoustic imaging, Optical imaging, Image resolution, Multispectral imaging, Tissues, Head, Ultrasonography, Photoacoustic tomography, Imaging systems, Photoacoustic spectroscopy

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Zebrafish is a top vertebrate model to study developmental biology and genetics, and it is becoming increasingly popular for studying human diseases due to its high genome similarity to that of humans and the optical transparency in embryonic stages. However, it becomes difficult for pure optical imaging techniques to volumetric visualize the internal organs and structures of wild-type zebrafish in juvenile and adult stages with excellent resolution and penetration depth. Even with the establishment of mutant lines which remain transparent over the life cycle, it is still a challenge for pure optical imaging modalities to image the whole body of adult zebrafish with micro-scale resolution. However, the method called photoacoustic imaging that combines all the advantages of the optical imaging and ultrasonic imaging provides a new way to image the whole body of the zebrafish. In this work, we developed a non-invasive photoacoustic imaging system with optimized near-infrared illumination and cylindrical scanning to image the zebrafish. The lateral and axial resolution yield to 80 μm and 600 μm, respectively. Multispectral strategy with wavelengths from 690 nm to 930 nm was employed to image various organs inside the zebrafish. From the reconstructed images, most major organs and structures inside the body can be precisely imaged. Quantitative and statistical analysis of absorption for organs under illumination with different wavelengths were carried out.

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