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Applied Optics

Applied Optics


  • Vol. 44, Iss. 10 — Apr. 1, 2005
  • pp: 1879–1888

Computational calibration method for optical tomography

Tanja Tarvainen, Ville Kolehmainen, Marko Vauhkonen, Antti Vanne, Adam P. Gibson, Martin Schweiger, Simon R. Arridge, and Jari P. Kaipio  »View Author Affiliations

Applied Optics, Vol. 44, Issue 10, pp. 1879-1888 (2005)

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We propose a computational calibration method for optical tomography. The model of the calibration scheme is based on the rotation symmetry of source and detector positions in the measurement setup. The relative amplitude losses and phase shifts at the optic fibers are modeled by complex-valued coupling coefficients. The coupling coefficients can be estimated when optical tomography data from a homogeneous and isotropic object are given. Once these coupling coefficients have been estimated, any data measured with the same measurement setup can be corrected for the relative variation in the data due to source and detector losses. The final calibration of the data for the source and detector losses and the source calibration between the data and the forward model are obtained as part of the initial estimation for reconstruction. The calibration method was tested with simulations and measurements. The results show that the coupling coefficients of the sources and detectors can be estimated with good accuracy. Furthermore, the results show that the method can significantly improve the quality of reconstructed images.

© 2005 Optical Society of America

OCIS Codes
(100.3190) Image processing : Inverse problems
(170.5280) Medical optics and biotechnology : Photon migration
(170.6960) Medical optics and biotechnology : Tomography

Original Manuscript: June 15, 2004
Revised Manuscript: November 19, 2004
Manuscript Accepted: November 19, 2004
Published: April 1, 2005

Tanja Tarvainen, Ville Kolehmainen, Marko Vauhkonen, Antti Vanne, Adam P. Gibson, Martin Schweiger, Simon R. Arridge, and Jari P. Kaipio, "Computational calibration method for optical tomography," Appl. Opt. 44, 1879-1888 (2005)

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