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Proceedings Paper

Transillumination using photon density waves: dependence of resolution on object position and detector size
Author(s): Horst Pulvermacher
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Paper 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.

Paper Details

Date Published: 31 January 1995
PDF: 12 pages
Proc. SPIE 2326, Photon Transport in Highly Scattering Tissue, (31 January 1995); doi: 10.1117/12.200809
Show Author Affiliations
Horst Pulvermacher, Ludwig-Maximilians-Univ. Muenchen (Germany)


Published in SPIE Proceedings Vol. 2326:
Photon Transport in Highly Scattering Tissue

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