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Article Dans Une Revue Inverse Problems Année : 2018

Fluorescence molecular imaging based on the adjoint radiative transport equation

Résumé

A new reconstruction algorithm for fluorescence diffuse optical tomography of biological tissues is proposed. The radia-tive transport equation in the frequency domain is used to model light propagation. The adjoint method studied in this work provides an efficient way for solving the inverse problem. The methodology is applied to a 2D tissue-like phantom subjected to a collimated laser beam. Indocyanine Green is used as fluorophore. Reconstructed images of the spatial fluorophore absorption distribution is assessed taking into account the residual fluorescence in the medium. We show that illuminating the tissue surface from a collimated centered direction near the inclusion gaves a better reconstruction quality. Two closely positioned inclusions can be accurately localized. Additionally, their fluorophore absorption coefficients can be quantified. However, the algorithm failes to reconstruct smaller or deeper inclusions. This is due to light attenuation in the medium. Reconstructions with noisy data are also achieved with a reasonable accuracy.
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Dates et versions

hal-01831190 , version 1 (05-07-2018)

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Fatmir Asllanaj, Ahmad Addoum, Jean Rodolphe Roche. Fluorescence molecular imaging based on the adjoint radiative transport equation. Inverse Problems, 2018, 34 (7), ⟨10.1088/1361-6420/aac28c⟩. ⟨hal-01831190⟩
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