Using graphics processing units to accelerate perturbation Monte Carlo simulation in a turbid medium

Journal of Biomedical Optics
Fuhong Cai, Sailing He

Abstract

We report a fast perturbation Monte Carlo (PMC) algorithm accelerated by graphics processing units (GPU). The two-step PMC simulation [Opt. Lett. 36, 2095 (2011)] is performed by storing the seeds instead of the photon's trajectory, and thus the requirement in computer random-access memory (RAM) becomes minimal. The two-step PMC is extremely suitable for implementation onto GPU. In a standard simulation of spatially-resolved photon migration in the turbid media, the acceleration ratio between using GPU and using conventional CPU is about 1000. Furthermore, since in the two-step PMC algorithm one records the effective seeds, which is associated to the photon that reaches a region of interest in this letter, and then re-run the MC simulation based on the recorded effective seeds, radiative transfer equation (RTE) can be solved by two-step PMC not only with an arbitrary change in the absorption coefficient, but also with large change in the scattering coefficient.

References

Jul 1, 1995·Computer Methods and Programs in Biomedicine·L WangL Zheng
Oct 1, 1996·Physics in Medicine and Biology·A Kienle, M S Patterson
Jan 7, 2009·Journal of Biomedical Optics·Erik AlerstamStefan Andersson-Engels

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