LASER TRANSILLUMINATION OF BREAST-TISSUE PHANTOMS USING TIME-RESOLVEDTECHNIQUES

The objective of this study was to evaluate a pulsed laser transillumi nation technique based on time-resolved detection on breast-tissue-lik e phantoms. Experiments have been performed on tissue-like plastic pha ntoms with different scattering characteristics. The effects of time-g ate width, size, localisation and refractive index of hidden objects h ave been scrutinised. Our study showed that the shorter the time-gate the higher the contrast. The contrast is very dependent of the size of the hole, whereas the full width half maximum is not. Furthermore, th e investigation showed that the changes of early detected light in an experimental setting is due to scattering, adn not to a higher speed o f the transmitted light.