Technology of Functional Imaging Based on Photons Diffuse
基于光子散射的功能成像技术

The technology of functional imaging ,based on diffusive photons model,was introduced.The diffusive path of photons was simulated and analyzed,using the Monte Carlo method,in order that the conception of diffuse photons was introduced.By interpreting the diffuse equation (DE),the conception of Diffuse Photons Density Wave (DPDW) was built.The wave function of DPDW with the infinite boundary condition was introduced,from which the heterogeneous DPDW wave function under semi-infinite boundary condition was deduced.Reconstruction algorithm,based on SVA with singular value weaken method,was established,by which the absorption coefficient distribution map had been reconstructed.The experiments of functional imaging result was presented,which was based on the imaging platform.The multiple objects with different concentration was imaged .The absorption change induced by tiny concentration variation was detected.Experiments demonstrate that the algorithm has a good noise- resistance performance.