1. A homotopy method for bioluminescence tomography.
- Author
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Gong, R. F., Cheng, X. L., and Han, W.
- Subjects
- *
BIOLUMINESCENCE , *HOMOTOPY theory , *TOMOGRAPHY , *DIAGNOSTIC imaging , *SPECTRUM analysis , *MEDICAL radiography - Abstract
Bioluminescence tomography (BLT) aims at the determination of the distribution of a bioluminescent source quantitatively. The mathematical problem involved is an inverse source problem and is ill-posed. With the Tikhonov regularization, an optimization problem is formed for the light source reconstruction and it is usually solved by gradient-type methods. However, such iterative methods are often locally convergent and thus the solution accuracy depends largely on initial guesses. In this paper, we reformulate the reduced regularized optimal problem as a nonlinear equation and apply a homotopy method, which is a powerful tool for solving nonlinear problem due to its globally convergent property, to it. Numerical experiments show that the application of the homotopy technique is feasible and can produce satisfactory approximate solutions for a very large range of initial guesses. [ABSTRACT FROM PUBLISHER]
- Published
- 2018
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