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Proceedings Paper

Contrast and spatial resolution of time-resolved transillumination images
Author(s): Dirk Grosenick; Heidrun Wabnitz; Herbert H. Rinneberg
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Paper Abstract

We have recorded time-resolved transillumination images of solid phantoms with objects embedded differing in their scattering and absorption coefficients from those of the bulk material. The optical properties of the phantoms were chosen similar to those of human breast tissue. Several quantities such as fractional transmittance and first moments as well as Fourier amplitudes and phase shifts have been derived from measured distributions of times of flight to form two-dimensional images. We discuss contrast and effective signal to noise ratio of such images. Assuming homogeneous optical properties, from an analysis of the Fourier transforms of the measured distributions of times of flight we have obtained effective (frequency dependent) transport scattering and absorption coefficients as a function of scanning position. The coefficients deduced in this way are in qualitative agreement with the known optical properties of the bulk of the phantoms and the embedded objects.

Paper Details

Date Published: 18 December 1995
PDF: 12 pages
Proc. SPIE 2626, Photon Propagation in Tissues, (18 December 1995); doi: 10.1117/12.228667
Show Author Affiliations
Dirk Grosenick, Physikalisch-Technische Bundesanstalt Berlin-Charlottenburg (Germany)
Heidrun Wabnitz, Physikalisch-Technische Bundesanstalt Berlin-Charlottenburg (Germany)
Herbert H. Rinneberg, Physikalisch-Technische Bundesanstalt Berlin-Charlottenburg (Germany)

Published in SPIE Proceedings Vol. 2626:
Photon Propagation in Tissues
Britton Chance; David T. Delpy; Gerhard J. Mueller, Editor(s)

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