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3 March 2022 2D-FC-ADMM reconstruction algorithm for quantitative optoacoustic tomography in a highly scattering medium: simulation study
Seyed Mohsen Ranjbaran, Hossein S. Aghamiry, Ali Gholami, Stéphane Operto, Kamran Avanaki
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Proceedings Volume 11960, Photons Plus Ultrasound: Imaging and Sensing 2022; 119600U (2022) https://doi.org/10.1117/12.2612977
Event: SPIE BiOS, 2022, San Francisco, California, United States
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Abstract
This study introduces a novel and powerful algorithm for optoacoustic tomography (OAT) in heterogeneous optical scattering media surrounded by optical fibers and ultrasonic transducers in a ring arrangement. The proposed algorithm uses the extended formulation of full-waveform inversion (FWI) based on the alternating direction method of multipliers (ADMM) and fluence compensation (FC). The speed of sound (SOS) map is required in this algorithm as prior information to perform classification and find different regions in the SOS map with equal optical absorption coefficients. The SOS map can be extracted by another FWI procedure applied to the acoustic data generated and recorded by transducers. The fluence map was calculated by Zemax inside the medium at near-infrared (NIR) optical wavelength. Finally, the proposed algorithm iteratively updates the optical absorption coefficients until the data computed with the estimated coefficients match the recorded photoacoustic signals at ultrasonic transducers. This approach shows extremely better results than classical time-reversal algorithms.
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Seyed Mohsen Ranjbaran, Hossein S. Aghamiry, Ali Gholami, Stéphane Operto, and Kamran Avanaki "2D-FC-ADMM reconstruction algorithm for quantitative optoacoustic tomography in a highly scattering medium: simulation study", Proc. SPIE 11960, Photons Plus Ultrasound: Imaging and Sensing 2022, 119600U (3 March 2022); https://doi.org/10.1117/12.2612977
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KEYWORDS
Reconstruction algorithms
Tomography
Optoacoustics
Algorithm development
Scattering
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