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Proceedings Paper

Unsupervised deep learning approach for photoacoustic spectral unmixing
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Paper Abstract

In photoacoustic imaging, accurate spectral unmixing is required for revealing functional and molecular information of the tissue using multispectral photoacoustic imaging data. A significant challenge in deep-tissue photoacoustic imaging is the nonlinear dependence of the received photoacoustic signals on the local optical fluence and molecular distribution. To overcome this, we have deployed an end-to-end unsupervised neural network based on autoencoders. The proposed method employs the physical properties as the constraints to the neural network which effectively performs the unmixing and outputs the individual molecular concentration maps without a-priori knowledge of their absorption spectra. The algorithm is tested on a set of simulated multispectral photoacoustic images comprising of oxyhemoglobin, deoxy-hemoglobin and indocyanine green targets embedded inside a tissue mimicking medium. These in silico experiments demonstrated promising photoacoustic spectral unmixing results using a completely unsupervised deep learning approach.

Paper Details

Date Published: 17 February 2020
PDF: 9 pages
Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112403H (17 February 2020); doi: 10.1117/12.2546964
Show Author Affiliations
Deepit Abhishek Durairaj, The Pennsylvania State Univ. (United States)
Sumit Agrawal, The Pennsylvania State Univ. (United States)
Kerrick Johnstonbaugh, The Pennsylvania State Univ. (United States)
Haoyang Chen, The Pennsylvania State Univ. (United States)
Sri Phani Krishna Karri, National Institute of Technology Andhra Pradesh (India)
Sri-Rajasekhar Kothapalli, National Institute of Technology Andhra Pradesh (India)
The Pennsylvania State Univ. (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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