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18 December 1995 Measurement and FEM calculation of light pulse propagtion through cylindrical homogeneous and inhomogeneous phantoms
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Abstract
Time-resolved measurement and FEM (finite element method) calculation were carried out for solid phantoms. Two cylindrical solid phantoms were made of epoxy resin containing titanium oxide particles as scatterer. Light source was sub-picosecond light pulse in the near infrared wavelength range, and a detector was a streak scope with 10 picosecond time resolution. One phantom was homogeneous both in scattering and absorption, and the other included two inhomogeneities with higher absorption than that of the background. Time-resolved transmittances measured at various detection angles were compared with the FEM results of the three dimensional diffusion equation. The agreement between the measured and calculated results was very good qualitatively and fairly good quantitatively. Both the measured and calculated results for the inhomogeneous case showed the reasonable deviation from the homogeneous case, and it has been shown that the existence of the inhomogeneities is measurable.
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Yukari Tanikawa-Takahashi, Yukio Yamada, Sergei G. Proskurin, Sho Mizuno, and Hiroshi Maki "Measurement and FEM calculation of light pulse propagtion through cylindrical homogeneous and inhomogeneous phantoms", Proc. SPIE 2626, Photon Propagation in Tissues, (18 December 1995); https://doi.org/10.1117/12.228654
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