A photon-transport forward model for image reconstruction in turbid media
is derived that treats weak inhomogeneities through a Born approximation of
the Boltzmann radiative transfer equation. This model can conveniently replace
the commonly used diffusion approximation in optical tomography. An analytical
expression of the background Green’s function is obtained from the cumulant
solution of the Boltzmann equation. Our model provides the correct behavior
of photon migration at early times and reduces at long times to the center-moved
diffusion approximation. Numerical comparisons between this model and the
standard and center-moved diffusion models are presented.
© 2001 Optical Society of America
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