Truncated correlation photoacoustic coherence tomography: An axial resolution enhancement imaging modality.

Alireza Jangjoo, Bahman Lashkari, Koneswaran Sivagurunathan, Andreas Mandelis, Mohammad Reza Baezzat

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Article in Photoacoustics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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5 authors.

Alireza JangjooCenter for Advanced Diffusion-Wave and Photoacoustic Technologies, Dept. of Mechanical and Industrial Engineering, University of Toronto, King's College Road, Toronto, ON, M5S 3G8, Canada.

Bahman LashkariCenter for Advanced Diffusion-Wave and Photoacoustic Technologies, Dept. of Mechanical and Industrial Engineering, University of Toronto, King's College Road, Toronto, ON, M5S 3G8, Canada.

Koneswaran SivagurunathanCenter for Advanced Diffusion-Wave and Photoacoustic Technologies, Dept. of Mechanical and Industrial Engineering, University of Toronto, King's College Road, Toronto, ON, M5S 3G8, Canada.

Andreas MandelisCenter for Advanced Diffusion-Wave and Photoacoustic Technologies, Dept. of Mechanical and Industrial Engineering, University of Toronto, King's College Road, Toronto, ON, M5S 3G8, Canada.

Mohammad Reza BaezzatDepartment of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this report we present a novel photoacoustic (PA) modality using pulsed chirp excitation at a fixed wavelength and spectral analysis based on frequency-domain (FD) processing. We introduce Truncated Correlation Photoacoustic Coherence Tomography (TC-PACT), a PA axial resolution enhancement methodology, with an application to closely stacked subsurface multilayers of plexiglass coated with a thin layer of graphite acting as surface absorber. The experimental results demonstrated that the SNR and the axial resolution were higher in TC-PACT than in conventional FD photoacoustics. A ns pulsed laser was also used as PA excitation source with axial resolution results found to be commensurate with TC-PACT. However, the separation distance between adjacent absorbers when the latter approached the axial resolution limit of the transducer was only resolved in TC-PACT compared to pulsed laser PA owing to the lower uncertainty in the former modality involved in determining the location of the absorbers.

Indexed as

Axial resolutionFrequency-domain photoacousticsPulsed laser photoacousticsTruncated-correlation photoacoustic coherence tomography

Identifiers

PMID34094853

DOI10.1016/j.pacs.2021.100277

PMCPMC8167188

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