Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Consideration of a spread-out source in problems of near-infrared optical tomography

Not Accessible

Your library or personal account may give you access

Abstract

When the light propagates in media where absorption is not negligible and∕or scattering is weak, a contribution to the energy density coming from ballistic photons cannot be neglected. A point source effectively spreads out over a scattering volume and its spatial distribution is described by the source function. We consider a boundary value problem of light propagation in half-space for such a source on the basis of the telegraph equation. A solution is found by convolution of Green's function with the source function. The final result shows a significant difference in the behavior of the radiant energy density between the solution obtained for a distributed source and the diffusion approximation. Our results agree well with the Monte Carlo simulations over a broad range of scattering and∕or absorption conditions. The obtained results are of practical importance in luminescence optical tomography because an erroneous shape of the energy density function may lead to an incorrect estimate of the light source depth after image reconstruction. The range of applications of the diffusion approximation is also discussed.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Phosphorescence lifetime imaging in turbid media: the forward problem

Vadim Soloviev, David Wilson, and Sergei Vinogradov
Appl. Opt. 42(1) 113-123 (2003)

Dynamically adaptive mesh refinement technique for image reconstruction in optical tomography

Vadim Y. Soloviev and Lada V. Krasnosselskaia
Appl. Opt. 45(12) 2828-2837 (2006)

Photon migration at short times and distances and in cases of strong absorption

D. J. Durian and J. Rudnick
J. Opt. Soc. Am. A 14(1) 235-245 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (95)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved