STUDY OF PHOTON PROPAGATION IN A LIQUID SCATTERING MEDIUM

We used an imaging technique that consists in recovering the ballistic photons traveling through a strongly diffusing solution of water and milk while blocking the diffuse light with an ultrafast optical Kerr g ate. in spite of the great absorbance of the medium (between 5 and 6), the image of an object immersed in it can be obtained. The temporal d iscriminating power (similar to 1 ps) improves the contrast aid the qu ality of the optical system allows high resolution (similar to 250 mu m). The eventual application of this technique to imaging of biologica l tissues, for mammography in particular, is considered.