A method for measuring the distributions of light in the biological tissue phantom Intralipid by use of an optical fiber is presented and measurements of distributions of light in Intralipid-10% suspensions at 650 nm are described. This approach is complementary to that in which an optical fiber with an isotropic tip detects the distribution of light in tissue phantoms. The characteristics of the distance-dependent intensity of scattering light in different directions were revealed by the experimental results; the effects of the optical parameters and of the radius of the incident beam on the distributions of light in tissue phantoms were given; and the experimental results were analyzed by the diffusion theory. These studies will help in further understanding of the scattering characteristics of tissue.

© 2003 Optical Society of America

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