Imaging of an absorbing object embedded in a dense scattering medium by diffusing light topography

A new and simple imaging method for an absorbing object embedded in a dense scattering medium is proposed. The distinct characteristic is the positive usage of the diffusing light in the dense scattering medium to image the a bsorbing object. The principle is based on the equivalence between a probab ility distribution function of the path-length and a backscattered intensit y distribution integrated spatially in the boundary plane between the mediu m and the air. The usefulness of the proposed method is experimentally conf irmed for a modified pyramidal object painted black and thin tubes filled w ith black and red inks. The conditions under which the better image can be reconstructed are confirmed from the results of experiments and simulations . It is finally shown that our proposed method is capable of imaging the ma p of blood vessels distributed under the skin layers.