J4 ›› 2015, Vol. 42 ›› Issue (1): 82-85.doi: 10.3969/j.issn.1001-2400.2015.01.013

• Original Articles • Previous Articles     Next Articles

Fluorescence molecular tomography method using simplified spherical harmonics approximation and Laplace regularization

LI Wei;YI Huangjian;ZHANG Qitan;LIANG Jimin   

  1. (School of Life Sciences and Technology, Xidian Univ., Xi'an  710071, China)
  • Received:2013-11-13 Online:2015-02-20 Published:2015-04-14
  • Contact: LI Wei E-mail:liwei@life.xidian.edu.cn

Abstract:

As an emerging optical molecular imaging technology, fluorescence molecular tomography can efficiently reconstruct concentrations and three dimensional distributions of the buried fluorophore in small animals and diagnose the early cancer. For the purpose of improving the performance of the reconstructed image, simplified spherical harmonics approximation (SPN) based on the radiative transport equation (RTE)is proposed to perform the forward simulation. To overcome the influence of ill-posedness and receive a more accurate reconstructed image, the Laplace regularization method is introduced to reconstruct the inverse problem. Numerical experiments reveal that the proposed method can acquire high-quality reconstructed images, especially of the small object and multi-objects.

Key words: fluorescence imaging, tomography imaging, simplified spherical harmonics approximation, regularization