RERADIATION AND IMAGING OF DIFFUSE PHOTON DENSITY WAVES USING FLUORESCENT INHOMOGENEITIES

Experiments demonstrate the reradiation of diffuse photon density wave s in turbid media by an obstacle filled with fluorescent dye. The rera diated energy was also in the form of a diffuse density wave that was readily detected at the red-shifted energy. In this process the inhomo geneity was converted into a source of diffuse photon density waves, a nd localization of the object can be accomplished by analysis of the r eradiated wavefronts. We will discuss these measurements and demonstra te some simple practical devices which are capable of localizing the c enter of such a fluorescent inhomogeneity.