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Proceedings Paper

A preclinical small animal imaging platform combining multi-angle photoacoustic and fluorescence projections into co-registered 3D maps
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Paper Abstract

We present the results on development of the 3D imaging platform combining photoacoustic tomography and fluorescence (PAFT) for preclinical and biological research. This combined multimodal imaging instrument addresses known deficiencies in sensitivity, spatial resolution, and anatomical registration of the individual imaging components. Multiangle photoacoustic projections, excited by an OPO operating in the near-infrared window, of a live anesthetized animal are used to reconstruct large volumes (30 cm3) that show deep anatomical vasculature and blood-rich tissues with resolutions exceeding 150 μm. A sCMOS camera is used for simultaneous co-registered multi-angle optical imaging. The images of a fluorescent dual-contrast agent are then reconstructed into a 3D volume using a tomographic algorithm. A separate 532-nm low-energy pulsed laser excitation is used for skin topography and imaging of superficial vasculature. All three imaging channels can be combined to produce spatially accurate in vivo volumes showing an animal’s skin, deep anatomical structures, and distribution of photosensitive molecular contrast agents. PAFT’s photoacoustic sensitivity was assessed using contrast agents in a phantom study. We demonstrate biomedical imaging application of PAFT’s combined imaging modalities by observing biodistribution of a dual-contrast agent injected intravenously to in vivo preclinical murine models.

Paper Details

Date Published: 17 February 2020
PDF: 13 pages
Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112400L (17 February 2020); doi: 10.1117/12.2549088
Show Author Affiliations
Weylan Thompson, PhotoSound Technologies, Inc. (United States)
Anthony Yu, Georgia Institute of Technology (United States)
Emory Univ. School of Medicine (United States)
Diego S. Dumani, Georgia Institute of Technology (United States)
Emory Univ. School of Medicine (United States)
Univ. de Costa Rica (Costa Rica)
Jason Cook, NanoHybrids, Inc. (United States)
Mark A. Anastasio, Univ. of Illinois at Urbana-Champaign (United States)
Stanislav Y. Emelianov, Georgia Institute of Technology (United States)
Emory Univ. School of Medicine (United States)
Sergey A. Ermilov, PhotoSound Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 11240:
Photons Plus Ultrasound: Imaging and Sensing 2020
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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