This paper presents the modified method of characteristics for simulating the transient transport of light in an absorbing and scattering medium exposed to collimated light. This method is based on the method of characteristics that follows photons along their pathlines. After showing the validity of the method it is used to solve for the transient transport of light in human skin. Skin has been modelled as a seven layer medium with different scattering and absorbing coefficients and scattering asymmetry factors. The angular distribution of reflected light from skin is presented. This technique could be used as a tool for designing various biomedical applications.
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