Transillumination using photon density waves: dependence of resolution on object position and detector size

Horst Pulvermacher

doi:10.1117/12.200809

31 January 1995 Transillumination using photon density waves: dependence of resolution on object position and detector size

Horst Pulvermacher

Author Affiliations +

Proceedings Volume 2326, Photon Transport in Highly Scattering Tissue; (1995) https://doi.org/10.1117/12.200809
Event: International Symposium on Biomedical Optics Europe '94, 1994, Lille, France

Abstract

After an analysis of the diffraction of plane photon density waves by plane periodic objects more general diffraction problems are treated in a way analogous to Fresnel diffraction. In this way approximation formula for the Gaussian momenta of the point spread functions for transillumination processes are gained. These expressions may be further simplified by an asymptotic expansion of the wave number of the photon density waves for large values of temporal frequency. A comparison with calculations on the basis of the diffusion theory and the method of the mirror images shows that the approximation usually is accurate within 10%. The method is applied to study the effect of object position and detector diameter on the Gaussian momentum of the point spread function.

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Horst Pulvermacher "Transillumination using photon density waves: dependence of resolution on object position and detector size", Proc. SPIE 2326, Photon Transport in Highly Scattering Tissue, (31 January 1995); https://doi.org/10.1117/12.200809

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