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Journal of Biomedical Optics

Coupled third-order simplified spherical harmonics and diffusion equation–based fluorescence tomographic imaging of liver cancer
Author(s): Xueli Chen; Fangfang Sun; Defu Yang; Jimin Liang
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Paper Abstract

For fluorescence tomographic imaging of small animals, the liver is usually regarded as a low-scattering tissue and is surrounded by adipose, kidneys, and heart, all of which have a high scattering property. This leads to a breakdown of the diffusion equation (DE)–based reconstruction method as well as a heavy computational burden for the simplified spherical harmonics equation (SPN). Coupling the SPN and DE provides a perfect balance between the imaging accuracy and computational burden. The coupled third-order SPN and DE (CSDE)-based reconstruction method is developed for fluorescence tomographic imaging. This is achieved by doubly using the CSDE for the excitation and emission processes of the fluorescence propagation. At the same time, the finite-element method and hybrid multilevel regularization strategy are incorporated in inverse reconstruction. The CSDE-based reconstruction method is first demonstrated with a digital mouse-based liver cancer simulation, which reveals superior performance compared with the SPN and DE-based methods. It is more accurate than the DE-based method and has lesser computational burden than the SPN-based method. The feasibility of the proposed approach in applications of in vivo studies is also illustrated with a liver cancer mouse-based in situ experiment, revealing its potential application in whole-body imaging of small animals.

Paper Details

Date Published: 21 September 2015
PDF: 4 pages
J. Biomed. Opt. 20(9) 090502 doi: 10.1117/1.JBO.20.9.090502
Published in: Journal of Biomedical Optics Volume 20, Issue 9
Show Author Affiliations
Xueli Chen, Xidian Univ. (China)
Fangfang Sun, Xidian Univ. (China)
Defu Yang, Xidian Univ. (China)
Jimin Liang, Xidian Univ. (China)

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