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Proceedings Paper

Multiport time-domain laser mammography: results on solid phantoms and volunteers
Author(s): Yves Painchaud; Alain Mailloux; Eric R. Harvey; Sonia Verreault; Julie Frechette; Caroline Gilbert; Marcia L. Vernon; Pierre Beaudry
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Paper Abstract

A prototype for laser mammography based on a time-domain technique has been developed. The system uses a streak camera and a Titanium:sapphire laser which provides ultrashort pulses at a repetition rate of 80 MHz. A multi-port scanning head which includes optical fibers scans the breast in a point-by-point scanning procedure. Time-resolved transmission is measured at 15000 locations in 7 minutes. The breast is slightly compressed in both the cranio-caudal and the mediolateral projections. Amplitude calibration of the streak camera has been performed allowing for absolute measurement of time- resolved transmission. In addition to the shape of the time-resolved transmission, the absolute amplitude is relevant in properly evaluating the absorption and scattering coefficients. Promising results on solid phantoms and in vivo have been obtained. Both breasts of 10 volunteers have been scanned to date and a larger pilot study is planned in the near future. In addition to the usual time-gating processing, images of the scattering and absorption contributions are also extracted using an original data processing technique.

Paper Details

Date Published: 15 July 1999
PDF: 8 pages
Proc. SPIE 3597, Optical Tomography and Spectroscopy of Tissue III, (15 July 1999); doi: 10.1117/12.356858
Show Author Affiliations
Yves Painchaud, Institut National d'Optique (Canada)
Alain Mailloux, Institut National d'Optique (Canada)
Eric R. Harvey, Institut National d'Optique (Canada)
Sonia Verreault, Institut National d'Optique (Canada)
Julie Frechette, Institut National d'Optique (Canada)
Caroline Gilbert, Institut National d'Optique (Canada)
Marcia L. Vernon, Institut National d'Optique (Canada)
Pierre Beaudry, Aerospace Research Technologies, Inc. (Canada)

Published in SPIE Proceedings Vol. 3597:
Optical Tomography and Spectroscopy of Tissue III
Britton Chance; Robert R. Alfano; Bruce J. Tromberg, Editor(s)

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