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6 April 2000 Optical coherence tomography: new analytical model and the shower curtain effect
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We have developed a new theoretical description of the optical coherence tomography (OCT) technique for imaging in highly scattering tissue. The description is based on the extended Huygens-Fresnel principle, valid in both the single and multiple scattering regimes. In contrast to previous OCT models, we have included the so-called shower curtain effect, which manifests itself in a standard OCT system with diffuse backscattering from the tissue discontinuity being probed, and a distance between the focusing lens and the tissue. We demonstrate that inclusion of this effect in the model leads to a strong increase in the heterodyne signal. The theoretical analysis is verified by measurements on samples consisting of aqueous suspensions of microspheres, and solid phantoms. Finally, we discuss the use of our new theoretical model for optimization of the OCT system.
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Lars Thrane, Harold T. Yura, and Peter E. Andersen "Optical coherence tomography: new analytical model and the shower curtain effect", Proc. SPIE 4001, Saratov Fall Meeting '99: Optical Technologies in Biophysics and Medicine, (6 April 2000);

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