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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 13 — Jun. 18, 2012
  • pp: 14437–14450

Quantitative 3D imaging of scattering media using structured illumination and computed tomography

E. Kristensson, E. Berrocal, and M. Aldén  »View Author Affiliations


Optics Express, Vol. 20, Issue 13, pp. 14437-14450 (2012)
http://dx.doi.org/10.1364/OE.20.014437


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Abstract

An imaging technique capable of measuring the extinction coefficient in 3D is presented and demonstrated on various scattering media. The approach is able to suppress unwanted effects due to both multiple scattering and light extinction, which, in turbid situations, seriously hampers the performance of conventional imaging techniques. The main concept consists in illuminating the sample of interest with a light source that is spatially modulated in both the vertical and horizontal direction and to measure, using Structured Illumination, the correct transmission in 2D at several viewing angles. The sample is then reconstructed in 3D by means of a standard Computed Tomography algorithm. To create the adequate illumination, a novel “crossed” structured illumination approach is implemented. In this article, the accuracy and limitation of the method is first evaluated by probing several homogeneous milk solutions at various levels of turbidity. The unique possibility of visualizing an object hidden within such solutions is also demonstrated. Finally the method is applied on two different inhomogeneous scattering spray systems; one transient and one quasi-steady state.

© 2012 OSA

OCIS Codes
(290.2200) Scattering : Extinction
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media
(110.0113) Imaging systems : Imaging through turbid media
(110.6955) Imaging systems : Tomographic imaging

ToC Category:
Imaging Systems

History
Original Manuscript: February 1, 2012
Revised Manuscript: March 29, 2012
Manuscript Accepted: April 11, 2012
Published: June 13, 2012

Virtual Issues
Vol. 7, Iss. 8 Virtual Journal for Biomedical Optics

Citation
E. Kristensson, E. Berrocal, and M. Aldén, "Quantitative 3D imaging of scattering media using structured illumination and computed tomography," Opt. Express 20, 14437-14450 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-13-14437


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