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Adaptive finite element based tomography for fluorescence optical imaging in tissue.

Amit Joshi, Wolfgang Bangerth, Eva Sevick-Muraca

    Optics Express
    |June 2, 2009
    PubMed
    Summary

    This study presents a 3D fluorescence optical tomography method using adaptive finite elements to reconstruct fluorescent targets in tissue. The technique offers efficient and stable inverse imaging for biomedical applications.

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    Area of Science:

    • Biomedical Optics
    • Medical Imaging
    • Computational Science

    Background:

    • Accurate reconstruction of fluorescent targets in turbid media is crucial for molecular imaging.
    • Existing optical tomography methods face challenges in computational efficiency and resolution.

    Purpose of the Study:

    • To develop and validate a 3D fluorescence-enhanced optical tomography (FEOT) scheme.
    • To improve the reconstruction of fluorescent targets in turbid media using adaptive finite element methods.

    Main Methods:

    • A 3D FEOT scheme based on adaptive finite element formulation was developed.
    • The photon diffusion model was treated as a constraint within a Lagrangian framework for optimization.
    • Adaptively refined meshes and a truncated Gauss-Newton method were employed for reconstruction.

    Main Results:

    • Successful reconstruction of one and two fluorescent targets in a simulated tissue phantom.
    • Demonstrated the achievable resolution for area-illumination/area-detection reflectance geometry.
    • Adaptive techniques provided computationally efficient and stable inverse imaging solutions.

    Conclusions:

    • The developed adaptive FEOT scheme enables efficient and stable reconstruction of fluorescent targets.
    • The method provides sufficient resolution for imaging molecularly targeting agents.
    • This approach advances optical tomography for biomedical applications.