Accelerated Monte Carlo method to reconstruct absorption coefficient from low coherent signal

A fast and effective method for reconstruction of optical absorption property of scattering object is developed. A revised Monte Carlo forward model is set up with new detection criteria for simulation of low coherence interferometer (LCI) system. Calculation of coherent signal could be accelerated by a scaling method based on baseline data simulated by Monte Carlo method. The inverse procedure of scaling method is utilized to extract absorption coefficient by dichotomy algorithm. Fat emulsion and stain mixture of Intralipid™ and India ink are taken as scattering and absorbing sample. The results of reconstruction have shown the linear relationship between absorption and concentration of India ink. The maximum absolute relative deviation is 6.21%.