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Comparison of the radiative transfer equations for constant and spatially varying refraction |
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| Authors: | Luis Martí-López Jorge Bouza-Domínguez RA Martínez-Celorio |
| Institution: | 1. Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, Calle 30, no. 502, Miramar, Ciudad de La Habana, Cuba;2. Laboratorio de Optoelectrónica, Centro de Neurociencias de Cuba, A.P. 6412, C.P. 10600, La Habana, Cuba;3. Bioengineering group, DICIS, University of Guanajuato, Salamanca, Gto, C.P. 38885, Mexico |
| Abstract: | The radiative transfer equation for scattering media with constant refraction index (RTE) and the radiative transfer equation for scattering media with spatially varying refraction index (RTEvri) are compared by using the principle of conservation of energy. It is shown that the RTEvri, not only accounts for the spatial variations of refraction index, but also contains a term that accounts for the divergence of the rays. The latter term is missing in the RTE. A corrected RTE is proposed. |
| Keywords: | Radiative transfer equation Optical tomography Scattering media |
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