ABSTRACT

As light propagates in an optically dense medium such as tissue, it rapidly loses its coherence, and as a result, light intensity (or photon ux density or radiance) is usually the observable quantity. To a reasonable approximation, the radiance can be shown to obey a diusion equation, which, when the

4.1 Introduction ......................................................................................169 4.2 Photon Transport in Tissue.............................................................172 4.3 Optical Diusion Tomography ...................................................... 174

4.5 Nonlinear Iterative Algorithm: Time-Resolved Data .................186 4.6 Conclusion .........................................................................................189 Acknowledgments ........................................................................................189 References ......................................................................................................189