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6 April 2012 Using graphics processing units to accelerate perturbation Monte Carlo simulation in a turbid medium
Fuhong Cai, Sailing He
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Journal of Biomedical Optics, Vol. 17, Issue 4, 040502 (April 2012). https://doi.org/10.1117/1.JBO.17.4.040502
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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2012/$25.00 © 2012 SPIE
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Fuhong Cai and Sailing He "Using graphics processing units to accelerate perturbation Monte Carlo simulation in a turbid medium," Journal of Biomedical Optics 17(4), 040502 (6 April 2012). https://doi.org/10.1117/1.JBO.17.4.040502
Published: 6 April 2012
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Cited by 17 scholarly publications.
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KEYWORDS
Monte Carlo methods
Scattering
Photodetectors
Sensors
Graphics processing units
Absorption
Computer simulations
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