Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantitative Photoacoustic Imaging of Two-photon Absorption   Two-photon absorption photoacoustic tomography (TP-PAT) is a recent hybrid
imaging modality that aims at reconstructing two-photon absorption properties
of heterogeneous media from measured ultrasound signals generated by the
photoacoustic effect. While there have been extensive experimental studies in
recent years to show the great promises of TP-PAT, very little has been done on
developing computational methods for quantitative image reconstruction in this
imaging modality. In this work, we present a mathematical model for
quantitative TP-PAT in diffusive media. We implemented a computational strategy
for the reconstruction of the optical absorption coefficients, and provide
numerical simulations based on synthetic acoustic data to demonstrate the
feasibility of quantitative reconstructions in TP-PAT.

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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat