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Proceedings Paper

Time-resolved imaging of a solid breast phantom
Author(s): David J. Hall; Jeremy C. Hebden; David T. Delpy
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Paper Abstract

A time-resolved imaging technique has been used to obtain 2D near-IR images of a solid phantom with optical properties very similar to those of breast tissue. The phantom consisted of a highly scattering plastic slab, 54 mm thick, containing four small cylindrical blocks of contrasting optical properties. Imaging involved translating a beam of pulses in two dimensions across the surface of the phantom while recording the temporal distribution of the transmitted light at the opposite surface with a streak camera. The entire imaging process was performed automatically under computer control. Images generated using the earliest arriving light improved the visibility of the embedded cylinders compared to continuous light transillumination, but those images corresponding to flight times less than around 700ps were severly degraded due to a lack of detected photons. This degradation was partially overcome while still achieving a significant gain in contrast and resolution by comparison of the data to a photon transport model of the temporal distributions and using the model predictions as high signal-to-noise versions of the original data. All the embedded cylinders were revealed with sub-centimeter resolution.

Paper Details

Date Published: 30 May 1995
PDF: 8 pages
Proc. SPIE 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation, (30 May 1995); doi: 10.1117/12.209966
Show Author Affiliations
David J. Hall, Univ. College London (United Kingdom)
Jeremy C. Hebden, Univ. College London (United Kingdom)
David T. Delpy, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 2389:
Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation
Britton Chance; Robert R. Alfano, Editor(s)

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