130 research outputs found
Mathematical Study and Numerical Simulation of Multispectral Bioluminescence Tomography
Multispectral bioluminescence tomography (BLT) attracts increasingly
more attention in the area of optical molecular imaging. In this paper, we analyze
the properties of the solutions to the regularized and discretized multispectral
BLT problems. First, we show the solution existence, uniqueness, and its
continuous dependence on the data. Then, we introduce stable numerical schemes and
derive error estimates for numerical solutions. We report some numerical results
to illustrate the performance of the numerical methods on the quality of multispectral
BLT reconstruction
Improving the Accuracy of the Diffusion Model in Highly Absorbing Media
The diffusion approximation of the Boltzmann transport equation is
most commonly used for describing the photon propagation in turbid
media. It produces satisfactory results in weakly absorbing and highly
scattering media, but the accuracy lessens with the decreasing albedo.
In this paper, we presented a method to improve the accuracy of the
diffusion model in strongly absorbing media by adjusting the optical parameters. Genetic algorithm-based optimization tool is used to find the
optimal optical parameters. The diffusion model behaves more closely to
the physical model with the actual optical parameters substituted by the
optimized optical parameters. The effectiveness of the proposed technique
was demonstrated by the numerical experiments using the Monte Carlo
simulation data as measurements
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