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Title: Passive ultrasound aided acoustic resolution photoacoustic microscopy imaging for layered heterogeneous media
Authors: Jin, Haoran
Zhang, Ruochong
Liu, Siyu
Zheng, Yuanjin
Keywords: Speed-of-sound Distribution
Photoacoustic Imaging
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Jin, H., Zhang, R., Liu, S., & Zheng, Y. (2018). Passive ultrasound aided acoustic resolution photoacoustic microscopy imaging for layered heterogeneous media. Applied Physics Letters, 113(24), 241901-. doi:10.1063/1.5064417
Series/Report no.: Applied Physics Letters
Abstract: Photoacoustic imaging reconstructions usually assume a known speed-of-sound (SOS) distribution; however, in most cases, the SOS distribution is not revealed and is difficult to estimate from photoacoustic signals. In this paper, we propose passive ultrasound aided acoustic resolution photoacoustic microscopy which simultaneously reconstructs SOS distributions and photoacoustic images for layered heterogeneous media. The passive ultrasound is a kind of laser-induced acoustic wave generated by a transducer absorbing the backscattered light. It can be used to measure the layer thicknesses due to its sensitivity to structural information and broad bandwidth and further determine the SOS distributions. After estimating the SOS distributions, a phase shift plus interpolation is employed to reconstruct the photoacoustic image for heterogeneous media. Without introducing additional hardware, this method can be conveniently incorporated into a conventional photoacoustic imaging system. A curved shell immersed in water is adopted as a layered heterogeneous phantom, and the proposed method reconstructs the targets (carbon rods) under this shell. Under the test of a 5 MHz focused transducer (NA 0.25), the maximum reconstruction deviation of 1.2 mm carbon rods is only 0.15 mm.
ISSN: 0003-6951
DOI: 10.1063/1.5064417
Rights: © 2018 The Author(s). All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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