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Topological imaging of blood vessels by using diffusing light

The topographic imaging technique using a backscattered diffusing light is proposed to monitor dynamics of blood vessels depending on the blood flow as a noncontact and noninvasive method. Their depth in skin tissues can be estimated by using the relation between a spatially-integrated backscattered intensity and a probability density function of an optical path-length. The topological image of the blood vessels is obtained per 0.08 sec by the developed system.