Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 2, 2007
|
|
---|---|---|
Article Number | 07015 | |
Number of page(s) | 7 | |
DOI | https://doi.org/10.2971/jeos.2007.07015 | |
Published online | 04 May 2007 |
Regular papers
Improved pertubation method for absorption map reconstruction in diffusion optical tomography
Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
Received:
19
February
2007
The perturbation method is an effective approach for optical tomography reconstruction, however its success depends to a great extent on how close initial estimates are to the actual solutions. In addition, the linear perturbation method can only be applied to the reconstruction of differences between two similar states. To overcome these limitations, we present a pre-scaling technique applied to the qualitative reconstruction of the absorption map. In this method, the initial estimate of the absorption coefficient is scaled to an appropriate value before it is employed in iteration. The scaled estimate leads to the forward solution on the boundary close to the measured data. In the simulated experiments, reconstructions were performed with and without the pre-scaling technique. The results demonstrate that the proposed technique extends the selection of the initial estimate of optical properties, and makes it feasible that the absolute value of optical properties can also be used in the linear perturbation approach.
Key words: optical tomography / reconstruction / inverse problems / absorption coefficient
© The Author(s) 2007. All rights reserved.
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