| Optical imaging has been widely applied in preclinical and clinical applications. Among all the models simulating light propagation in biological tissue, Mote Carlo (MC) method is becoming more and more widespread. However, MC method is time-consuming due to the calculation of a large number of photons propagating in biological tissue. Hence, how to improve the speed of MC stimulation has attracted much more attention. There are a lot of incidents happen while photon crossing the tissue boundary. So the optimization of computing the intersection between photon path and tissue boundaries could effectively speed up the MC simulation.This thesis first introduces the implementation of MC method of light propagation in biological tissue, and then presents the improved algorithm for the calculation of the intersection—between the ray and the regular shape, the irregular shape. The platform MOSE (Molecular Optical Simulation Environment) developed by our laboratory is used to demonstrate the correctness and the efficiency of the proposed algorithms. |
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