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Title

Monte Carlo modeling of optical coherence tomography imaging through turbid media

Author(s)

Lu, Qiang;  Gan, Xiaosong;  Gu, Min;  Luo, Qingming

Abstract

We combine a Monte Carlo technique with Mie theory to develop a method for simulating optical coherence tomography (OCT) imaging through homogeneous turbid media. In our model the propagating light is represented by a plane wavelet; its line propagation direction and path length in the turbid medium are determined by the Monte Carlo technique, and the process of scattering by small particles is computed according to Mie theory. Incorporated into the model is the numerical phase function obtained with Mie theory. The effect of phase function on simulation is also illustrated. Based on this improved Monte Carlo technique, OCT imaging is directly simulated and phase information is recorded. Speckles, resolution, and coherence gating are discussed. The simulation results show that axial and transversal resolutions decrease as probing depth increases. Adapting a light source with a low coherence improves the resolution. The selection of an appropriate coherence length involves a trade-off between intensity and resolution.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences

Source

Applied Optics, Vol. 43, no. 8 (2004), pp. 1628-1637

Publication year

2004

Keyword(s)

Turbidity;  Dispersive media;  Absorbing media;  Optical tomography;  Coherence;  Biomedical imaging;  Light scattering;  Monte Carlo methods;  Modelling

Publisher

Optical Society of America

ISSN

0003-6935

Publisher URL

http://dx.doi.org/10.1364/AO.43.001628

Copyright

Copyright © 2004 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.43.001628. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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