Evaluation of steady–state, time– and frequency domain data for the problem of optical diffusion tomography

H. L. Graber et al. (1992)


The three techniques of CW, time–gated, and frequency modulation measurements are examined and compared for their ability to provide clues to the macroscopic optical properties of multilayer random media. For each illumination scheme, a simple algorithm is described which is capable of identifying important parameters such as the ratio of macroscopic absorption cross sections across layer boundaries, and the depth of boundaries in two– and three–layer media. The algorithms are developed by consideration of data from Monte Carlo simulations, and in the case of the time– and frequency domains are tested by using them to analyze experimental data.